Delhi Police Constable Exam Model Paper 6

Question : 85 of 100

Marks: +1, -0

Average age of 15 students of group is 24 years and three students of ages respectively 8 years, 11 years and 29 years left the group, then find the new average age of the group.

28 years
24 years
26 years
27 years

Validate

Solution:

GIVEN:
Average age of 15 students of group = 24 years
FORMULA USED:
Average

=\text"Sum of numbers"/\text"Total numbers"

CALCULATION:
Sum of ages of 15 students = 15 × 24 = 360 years
Sum of ages of 12 students when 3 students left the group = 360 – 8 – 11 – 29 = 312 years
New average age of the group = 312/12
= 26 years

Go to Question:

Prev Question

Next Question