Question

The average age of a group of 10 students is 30 years. Two persons of age 25 years and 30 years, left the group and 2 persons of age 54 years and 101 years, joined the group. Find the new average age of the group.

A 37 years Correct Answer Incorrect Answer
B 31 years Correct Answer Incorrect Answer
C 43 years Correct Answer Incorrect Answer
D 40 years Correct Answer Incorrect Answer

Solution

Required average = {(10 × 30) – 25 – 30 + 54 + 101}/10 = 40 years

Practice Next

Relevant for Exams:

×
×