Question

mean height of 3 boys is 142cm and the mean heigth of another 7 students is 145cm then the mean height of 10 students i​

Answer 1

Answer:

287cm

Step-by-step explanation:

Mean height of 3 boys = 142 cm (given)

Mean height of other 7 boys =145cm (given)

Mean height of 10 boys= mean height of 3boys+ mean height of 7 boys

=142+145=287.

Hope it helps.