Question

Average height of 22 boys in class is 140 and the average height of 28 boys in another class is 152,waht is average of both combined

Answer 1

sorry, there is some mistake . There will be 152 instead of 154 in the answer. Sorry for the mistake.

Answer 2

Mean = average
Total no.of boys =22
Mean of boys =140 cm
So total height =140*22 =3080 cm
Total no. Of boys in another class =28
Mean = 152
Total sum of their height = 28*152= 4256 cm
Sum of height of boys of both section = 3080+4256=7336
Total no. of boys =50
Mean = 7336/50= 146.72 cm
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