Question

1. X, 25, 110 0
7. The mean height of four boys is 145 cm. If the heights of three of them are 150 cm, 142 cm
and 146 cm, find the height of the fourth boy.

ans :
mean sum of all the observation
________________________
number of observation
145=x+150+142+146
____________
4
580=x+438
x=580-438
x= 142cm
so the height of fourth boy is 142​

Answer 1

Answer:

Number 145=x+150+146+142=580=x+438=x=580-438=x=142cm answer