Mixtures and Allegations Practice Test 1

Question : 2 of 40

Marks: +1, -0

The average age of boys and girls in a class is 6.8 years and 8.8 years respectively and the average age of all 35 students in the class is 7.66 years, The number of girls in a class is:

13 girls
22 girls
16 girls
15 girls
20 girls

Validate

Solution:

So, the required number of girls =

3 /7 ×35

= 15 girls

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