Question

In a class of 32 students

Answer 1

1.48 m

Explanation:

mean is calculated as

mean =
`(sum)/(count)`

Then the sum for the 14 boys is

`(sum)/(14)` = 1.56 ( multiply both sides by 14 )

sum = 21.84 m

The sum for the class of 32 is

`(sum)/(32)` = 1.515 ( multiply both sides by 32 )

sum = 48.48 m

Thus the sum for the 18 girls is

sum = 48.48 - 21.84 = 26.64 m

Then mean height of girls is

mean =
`(26.64)/(18)` = 1.48 m