the mean weight of 5 student is 51 kg and the mean weight of 4 student is 54 kg find the mean weight of 9 student will be -?..
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51+54
_________ = 105 = 11.66
9 9
Mean = 11.66
Answered by
3
X/5 = 51
Y/4 = 54
so, (51*5+54*4)/9 = 52.33 ans.
gaurav96181:
no answer is between 52 kg and 53 kg
ok
yes 52.33 comes between 52 and 53
cant u see?
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