Postal or Sorting Assistants Model Paper 6 With Solutions

Question : 10 of 100

Marks: +1, -0

The average age of 35 students in a class is 16 years. Out of these students the average age of 21 students is 14 years.The average age of remaining students is

15 years
17 years
20 years
19 years

Validate

Solution:

(d) Total sum of ages of 35 students =

35×16

Total sum of ages of 21 students

= 21 × 14

The average of remaining students

= {35×16-21×14}/14

= 19 years

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