The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What is the average height of the 5 boys who leave ?

Akash Lawaniya • 9.58K Points
Tutor III Math

Q. The average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What is the average height of the 5 boys who leave ?

(A) 0.8 m
(B) 0.9 m
(C) 0.95 m
(D) 1.05 m

Correct Answer - Option(A)

Explanation by: Akash Lawaniya

Sum of height of the 5 boys
= (25 × 1.4 - 20 × 1.55) m
= 4 m
∴ Required average
= (4/5)

= 0.8 m

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