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 A is fifteenth from the left end and B is eight from the right end. If there are 4 boys between them and B is to the right of A then the total number of student sitting in the row
  • a)
    26
  • b)
    27
  • c)
    28
  • d)
    29 ​
  • e)
    None of these
Correct answer is option 'B'. Can you explain this answer?
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A is fifteenth from the left end and B is eight from the right end. If...
Given information:
- A is fifteenth from the left end.
- B is eight from the right end.
- There are 4 boys between A and B.
- B is to the right of A.

To find: Total number of students sitting in the row.

Approach:
Let's first find the number of students between A and B.
Number of students between A and B = Total number of students - (position of A + position of B)
= Total number of students - (15 + 8)
= Total number of students - 23

Given that there are 4 boys between A and B. So, the number of girls between A and B = Total number of students between A and B - 4
= Total number of students - 23 - 4
= Total number of students - 27

Now, we know that B is to the right of A. So, the number of students to the right of A = position of B - position of A - 1 (excluding A and B)
= 8 - 15 - 1
= -8 (which is not possible)

Hence, there must be some students to the left of A as well. Let's assume that there are x students to the left of A.

So, the total number of students in the row = x + 15 + 4 + (Total number of students - 27)
= x + Total number of students - 8

Now, we know that B is to the right of A. So, x + 15 + 4 < total="" number="" of="" students="" -="" />
=> x + 19 < total="" number="" of="" students="" -="" />
=> x < total="" number="" of="" students="" -="" />

Also, we know that A is fifteenth from the left end. So, x + 15 = 16
=> x = 1

Substituting x = 1 in the above equation, we get:
Total number of students = x + Total number of students - 8
=> Total number of students = 9 + 8
=> Total number of students = 17

Therefore, the total number of students sitting in the row is 17, which is option (B).
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Directions : Read the following information carefully and answer the questions given below:There are eight-person P, Q, R, S, T, U, V, and W is sitting around a circle. Some are facing the center while some are not. They also like different colour like white, green, red, black, pink, blue, yellow and brown. P is sitting third to the right of R. There is one person sitting between P and Q. S is sitting fourth to right of Q. The person who likes red sits second to the right of S. P does not like the red colour. Three persons sit between the person who likes red and brown colour. The person who likes white colour sits second to the right of the person who likes brown colour. S does not like white colour. The person who likes blue sits third to the right of the person who likes white colour. R likes blue colour. There are two persons sits between S and T. There are three persons sits between the person who likes pink and black colour. T does not like the pink or black colour. There is one person sits between the person who likes black and green colour. The person who likes red colour sits third to the right of the person who likes green colour. The person who likes yellow colour sits third to the right of the person who likes black colour. V sits fourth to right of the person who likes pink colour. U is not the immediate neighbor of V. The person who likes pink colour sits third to the left of the person who likes red colour and both faces the same direction.(Same direction means if one faces center then other also faces the center and vice-vers

A is fifteenth from the left end and B is eight from the right end. If there are 4 boys between them and B is to the right of A then the total number of student sitting in the rowa)26b)27c)28d)29 e)None of theseCorrect answer is option 'B'. Can you explain this answer?
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