the mean weight of 4 students of a class is 32 kg if the weight of three students is 28 kg 36 kg and 20 kg find the weight of 4th student
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Step-by-step explanation:
mean weight of 4 students= 32 kg
total age of 4 students = 32×4= 128
total age of 3 students = 28+36+20
= 84
age of 4th student = 128-84
= 44
#666
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