(O) year
56. There are 50 students in a class. The average height of 30 students is 160
cm. and the average height of the remaining students is 155 cm. Find the
average height of all the students of the class.
Answers
Answered by
0
Answer:
136
Explanation:
Avg height of 30 boys = 160 cm
Since avg = sum of all heights/number of boys
sum of heights of 30 boys = 30x160 = 4800cm
remaining boys = 50–30 = 20
avg height of 20 boys = 100 cm
using the same logic as above, sum of heights of 20 boys = 20x100 = 2000cm
Therefore, sum of heights of all boys aka 50 boys = 4800+2000
=6800cm
avg height of 50 boys = total sum/50
= 6800/50 = 136cm
Answered by
1
Explanation:
Answer of this question is 158
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