Data Analysis Practice Test 1

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Directions (34-35): Study the information and answer the questions.
In a survey conducted by a standard of living regulatory society, it was found that the average expenditure of a boy in a month is Rs 3,000, an average expenditure of a girl in a month is Rs 2,000 and an average expenditure of both is 2,325.

Question : 34 of 65

Marks: +1, -0

What is the possible strength of the boys?

13
27
36
39
Cannot be determined

Validate

Solution:

Solutions (34–35):
Let the number of boys = x
Number of girls = y

{(x×3000)+(y×2000)}/{x+y}=2325

3,000 x + 2,000 y = 2,325x + 2,325y

675x= 325 y

x/y=13/17

Hence, required ratio of boys and girls is 13 : 27 and the possible strength of the boys is 13.

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