The mean weight per student in a group of seven students is 55 kg. If the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then the weight of the seventh student is
Question and options
The mean weight per student in a group of seven students is 55 kg. If the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then the weight of the seventh student is
- 55 kg
- 60 kg
- 57 kg
- 50 kg
Answer and explanation
Correct answer: C - 57 kg
Total = 7 x 55 = 385. The six known weights add to 328, so the seventh = 385 - 328 = 57 kg.
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CUSAT CAT Five-Year LL.B.
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