Q372
The average height of 30 boys out of a class of 50 is 160 cm. If the average height of the remaining boys is 165 cm, the average height of the whole class (in cm) is :
A.
161
B.
162
AnswerC.
163
D.
164
Answer: Option B
Solution
Answer: Option B
Solution:
Average height of the whole class= 96 + 66
= 162 cm