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2016-03-13T13:58:03+05:30

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Mean of The Weight of all 7 Students  =  55kg
Let Individual Weights = 52,54,55,53,56,54,x[Let x be The Value of                                                                                                         7 th  students]

So,
(52 + 54 + 55 + 53 + 56 + 54 + x) /7 = 55
324 + x = 55 * 7
324 + x = 385
x = 385 - 324
x = 61 kgs

Ans = 7th Students's Weight = 61 kgs

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2016-03-15T18:29:40+05:30
Answer is this......................
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