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CAT Exam  >  CAT Tests  >  Logical Reasoning (LR) and Data Interpretation (DI)  >  Test: Venn Diagrams- 1 - CAT MCQ

Test: Venn Diagrams- 1 - CAT MCQ


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10 Questions MCQ Test Logical Reasoning (LR) and Data Interpretation (DI) - Test: Venn Diagrams- 1

Test: Venn Diagrams- 1 for CAT 2024 is part of Logical Reasoning (LR) and Data Interpretation (DI) preparation. The Test: Venn Diagrams- 1 questions and answers have been prepared according to the CAT exam syllabus.The Test: Venn Diagrams- 1 MCQs are made for CAT 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Venn Diagrams- 1 below.
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Test: Venn Diagrams- 1 - Question 1
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Shyam visited Ram during his brief vacation. In the mornings they both would go for yoga. In the evenings they would play tennis. To have more fun, they indulge only in one activity per day, i.e. either they went for yoga or played tennis each day. There were days when they were lazy and stayed home all day long. There were 24 mornings when they did nothing, 14 evenings when they stayed at home, and a total of 22 days when they did yoga or played tennis. For how many days Shyam stayed with Ram?

Detailed Solution for Test: Venn Diagrams- 1 - Question 1

Let the number of days in the vacation be x
They played tennis for x - 14 days
They did yoga for x - 24 days
So, they did yoga or played tennis for x - 14 + x - 24 = 2x - 38 days
2x – 38 = 22
=> x = 30

Test: Venn Diagrams- 1 - Question 2
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There are 3 clubs A, B & C in a town with 40, 50 & 60 members respectively. While 10 people are members of all 3 clubs, 70 are members in only one club. How many belong to exactly two clubs?

Detailed Solution for Test: Venn Diagrams- 1 - Question 2

We know that x + y + z = T and x + 2y + 3z = R, where
x = number of members belonging to exactly 1 set = 70
y = number of members belonging to exactly 2 sets
z = number of members belonging to exactly 3 sets = 10
T = Total number of members
R = Repeated total of all the members = (40 + 50 + 60) = 150
Thus we have two equations and two unknowns. Solving this we get y = 25

So, 25 people belong to exactly 2 clubs.

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Test: Venn Diagrams- 1 - Question 3
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In a class of 60, along with English as a common subject, students can opt to major in Mathematics, Physics, Biology or a combination of any two. 6 students major in both Mathematics and Physics, 15 major in both Physics and Biology, but no one majors in both Mathematics and Biology. In an English test, the average mark scored by students majoring in Mathematics is 45 and that of students majoring in Biology is 60. However, the combined average mark in English, of students of these two majors, is 50. What is the maximum possible number of students who major ONLY in Physics?

Detailed Solution for Test: Venn Diagrams- 1 - Question 3

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Test: Venn Diagrams- 1 - Question 4
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Out of 60 families living in a building, all those families which own a car own a scooter as well. No family has just a scooter and a bike. 16 families have both a car and a bike. Every family owns at least one type of vehicle and the number of families that own exactly one type of vehicle is more than the number of families that own more than one type of vehicle. What is the sum of the maximum and minimum number of families that own only a bike?
Detailed Solution for Test: Venn Diagrams- 1 - Question 4

From the information given in the question, the following Venn Diagram can be constructed:

So, in order to maximize the number of families that own only a bike, we can put the remaining 44 families in ‘only bike’ region.

Similarly, in order to minimize the number of families that own only a bike, we can put the remaining 44 families in ‘only scooter’ region.

So, the maximum number of families that own only a bike is 44 and the minimum number of families that own only a bike is 0.

So, sum = 44 + 0 = 44

Test: Venn Diagrams- 1 - Question 5
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A premier B-school, which is in process of getting an AACSB accreditation, has 360 second year students. To incorporate sustainability into their curriculum, it has offered 3 new elective subjects in the second year namely Green Supply Chain, Global Climate Change & Business and Corporate Governance. Twelve students have taken all the three electives, and 120 students study Green Supply Chain. There are twice as many students who study Green Supply Chain and Corporate Governance but not Global Climate Change and Business, as those who study both Green Supply Chain and Global Climate Change & Business but not Corporate Governance, and 4 times as many who study all the three. 124 students study Corporate Governance. There are 72 students who could not muster up the courage to take up any of these subjects. The group of students who study both Green Supply Chain and Corporate Governance but not global Climate Change & Business is exactly the same as the group made up to the students who study both Global Climate Change & Business and Corporate Governance. How many students study Global Climate Change & Business only?
Detailed Solution for Test: Venn Diagrams- 1 - Question 5

The number of students who study each combination of subjects (based on the direct data) given is as shown below:

It is given that: (GSC and CG but not GCCB) = 4 times (all three electives)

∴ 2x = 4(12) i.e. x = 24

Also: (GSC and CG but not GCCB) = (all three electives) + (GCCB and CG but not GSC) 

∴ (GCCB and CG but not GSC) = 2x − 12 = 2(24) − 12 = 36

So, the figure becomes:

Now, CG only = 124 − (48 + 12 + 36) = 28 

∴ GCCB alone = 360 − 120 − 36 − 28 − 72 = 104

Hence, option (b).

Test: Venn Diagrams- 1 - Question 6
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In a certain village, 22% of the families own agricultural land, 18% own a mobile phone and 1600 families own both agricultural land and a mobile phone. If 68% of the families neither own agricultural land nor a mobile phone, then the total number of families living in the village is:
Detailed Solution for Test: Venn Diagrams- 1 - Question 6

Let total number of families in the village be T
Number of families own agricultural land, n(A) = 0.22T

Number of families own mobile phone, n(M) = 0.18T

Number of families own both agricultural land and mobile phone, n(A ⋂ M) = 1600

Number of families own agricultural land or mobile phone, n(A ⋃ M) = T – 0.68T = 0.32T

∴ n(A ⋃ M) = n(A) + n(M) – n(A ⋂ M)

∴ n(A ⋂ M) = 0.08T

0.08T = 1600 ⇒ T = 20000

Hence, option (a).

Test: Venn Diagrams- 1 - Question 7
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There were a hundred schools in a town. Of these, the number of schools having a play - ground was 30, and these schools had neither a library nor a laboratory. The number of schools having a laboratory alone was twice the number of those having a library only. The number of schools having a laboratory as well as a library was one-fourth the number of those having a laboratory alone. The number of schools having either a laboratory or a library or both was 35.

What was the ratio of schools having laboratory those having library?
Detailed Solution for Test: Venn Diagrams- 1 - Question 7


The diagram for this question has been shown:
Total number of schools having either or LAB or LIB or both = a + b + x/2 - y + y + 3x = 7x/2 + a + b = 35
It has been given that the schools having playground don't have a Library or Laboratory.
Hence  a = b = y = 0
7x/2 = 35
x = 10
Required ratio = 25:15 = 5:3

Test: Venn Diagrams- 1 - Question 8
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Students in a college have to choose at least two subjects from chemistry, mathematics and physics. The number of students choosing all three subjects is 18, choosing mathematics as one of their subjects is 23 and choosing physics as one of their subjects is 25. The smallest possible number of students who could choose chemistry as one of their subjects is
Detailed Solution for Test: Venn Diagrams- 1 - Question 8

Now 23 students choose maths as one of their subject.
This means (MPC)+ (MC) + (PC) = 23 where MPC denotes students who choose all the three subjects maths,
physics and chemistry and so on.
So MC + PM =5 Similarly we have PC+ MP = 7
We have to find the smallest number of students choosing chemistry
For that in the first equation let PM = 5 and MC = 0. In the second equation this PC = 2
Hence minimum number of students choosing chemistry will be (18 + 2) = 20 Since 18 students chose all the
three subjects.

Test: Venn Diagrams- 1 - Question 9
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A club has 256 members of whom 144 can play football, 123 can play tennis, and 132 can play cricket. Moreover, 58 members can play both football and tennis, 25 can play both cricket and tennis, while 63 can play both football and cricket. If every member can play at least one game, then the number of members who can play only tennis is
Detailed Solution for Test: Venn Diagrams- 1 - Question 9

Assume the number of members who can play exactly 1 game = I

The number of members who can play exactly 1 game = II

The number of members who can play exactly 1 game = III

I + 2lI + 3lll = 144 + 123 +132 = 399 .... (1)

I + lI + lII = 256 .....(2)

⇒ II + 2llI = 143. .....(3)

Also, II + 3III = 58 + 25 + 63 = 146 ......(4)

⇒ III = 3 (From 3 and 4)

⇒ II =137

⇒ I = 116

The members who play only tennis = 123 - 58 - 25 + 3 = 43

Test: Venn Diagrams- 1 - Question 10
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There were a hundred schools in a town. Of these, the number of schools having a play - ground was 30, and these schools had neither a library nor a laboratory. The number of schools having a laboratory alone was twice the number of those having a library only. The number of schools having a laboratory as well as a library was one-fourth the number of those having a laboratory alone. The number of schools having either a laboratory or a library or both was 35.

How many schools had none of the three viz., laboratory, library or play - ground?
Detailed Solution for Test: Venn Diagrams- 1 - Question 10


The diagram for this question has been shown:
Total number of schools having either or LAB or LIB or both = a+b+x/2 - y + y + 3x = 7x/2 + a + b = 35
Here a = b = y = 0
7x/2 = 35
x = 10
Total number of schools having at least one of PG, LIB or LAB = 30 + 2x + x + x/2 = 30 + 3x + x/2 = 30 + 30 + 5 = 65
Number of schools having neither of the three = 100 - 65 = 35

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