Question

The mean height of 40 students of a class is 154cm. What will be the new mean after 1 year if each of them gains 2cm

Answer 1

Answer:

mean of 40 students=154cm

sum of 40 students=154×40=6160

after 1 year each gains 2cm

so total increase is 40×2=80cm

sum becomes 6160+80=6240

mean becomes 6240/40=156

Please mark as brainliest