Introduction to statistics
Question
The mean weight per student in a group of seven students is 55 kg. If the individual weights of six students are 52, 58, 55, 53, 56 and 54, then the weight of the seventh student is
Very Easy
Solution
The total weight of seven students is 55 x 7 = 385 kg
The sum of the weights of six students is 52 +58 + 55 + 53 + 56 + 54 =328kg
Hence, the weight of the seventh student is 385 - 328 = 57 kg
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