The average height of 40 girls out of a class of 50 is 169 cm. and that of the remaining girls is ...

The average height of 40 girls out of a class of 50 is 169 cm. and that of the remaining girls is 167 cm. The average height of the whole class is :

Answer/Solution

168.6 cms

Steps/Work

Explanation:
Average height of the whole class =(40×169+10×167/50)=168.6 cms
Answer C

General Calculator / Auto Solver

The average height of girls out of a class of is cm. And that of the remaining girls is cm. The average height of the whole class is :

Calculated Answer

168.6

Step by Step Solution

In order to solve problem, you must evaluate (n₀ * n₂ + n₃ * 10) / n₁.

n₀ =	40
n₁ =	50
n₂ =	169
n₃ =	167

(n₀ * n₂ + n₃ * 10) / n₁
Evaluate n₀ * n₂ = 6760
(6760 + n₃ * 10) / n₁
Evaluate n₃ * 10 = 1670
(6760 + 1670) / n₁
Evaluate 6760 + 1670 = 8430
8430 / n₁
Evaluate 8430 / n₁ = 168.6
168.6
The answer to the problem and the result of (n₀ * n₂ + n₃ * 10) / n₁ is 168.6