Olympiad Test: Data Handling - Class 7 MCQ

 Average =hours

The range of a given data is the difference between its highest and lowest values. From the given data, range =154−128=26.

seen in the diagram at 6 pm fruits sale < vegetables sale

No. of kilograms of-fruits sold during the four hours= 35+26+45+20=126.

Mean of first 5 natural numbers = 
Median of 1,2,◯3,4,5,=3

•   No. of kilograms of-fruits sold during the four hours

  =35+26+45+20=126

  .

The first five prime numbers are 2, 3, 5, 7 and 11.
∴Their mean == 5.6

Since two dice are thrown simultaneously total numbers of outcomes are 6*6=36 . We make pairs of it
(1,1)   (2,1)   (3,1).....(6,1)
   :         :         :    :::::     :
(1,6)   (2,6)   (3,6).....(6,6)

Total number of outcomes = 10
No. of favourable outcomes = 2 red balls
Probability of red balls =  No. of favourable outcomes/Total number of outcomes
= 2/10= 1/5 

Number of red balls = 2

Total number of balls = 2 + 3 + 5

Performing addition

Total number of balls = 10

Keep the values in formula to find the probability of getting black ball.

Performing division

Probability of getting black ball = 5/10

Hence, the probability of getting a black ball is 1/2

The number of black balls =5 

Probability of getting black ball = 5/10 = 1/2

Probability of getting a non black ball = 1 - Probability of getting a black ball

= 1 -1/2 = 1/2

Understanding Class Intervals

In a frequency distribution table, class intervals represent the ranges of data grouped together. The size of a class interval is the difference between the upper limit and the lower limit of any class.

Analyzing the Table

From the table, we can observe the following class intervals:

• 100-125
• 125-150
• 150-175
• 175-200
• 200-225
• 225-250
• 250-275
• 275-300
• 300-325

Calculating the Size

Let's take the first class interval as an example: 100-125.

• Upper limit = 125
• Lower limit = 100

Size of the class interval = Upper limit - Lower limit = 125 - 100 = 25

Consistent Size

If we calculate the size of other class intervals in the same way, we will find that they all have the same size of 25.

Conclusion

Therefore, the size of the class intervals in the given table is 25.

Upper limit is the largest quantity in the interval. So the upper limit is 275.