the mean weight of 4 members of a family is 60 kg three of them @ 56 kg 60 kg and 72 kg respectively find the weight of the fourth member
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Step-by-step explanation:
Mean weight =60
3 have :52,60,72
Mean weight = (52+60+72+x)÷4
Where x is the weight of the fourth person.
= (184+x)÷4
=46+x÷4 = 60
=x÷4=60-46 = 14
=x = 14×4 = 52
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