The mean of ten numbers is 58. If one of the numbers is 40, what is the mean of the other nine?
The mean of the other nine numbers is 60. The total of all ten is 10 × 58 = 580; removing 40 leaves 540, and 540 ÷ 9 = 60.
Choose your answer
The mean of ten numbers is 58. If one of the numbers is 40, what is the mean of the other nine?
Answer and explanation
Correct answer B
The mean of the other nine numbers is 60. The total of all ten is 10 × 58 = 580; removing 40 leaves 540, and 540 ÷ 9 = 60.
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Gujarat SET (GSET)