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The mean of 11 numbers is 35. If the mean of first 6 numbers is 32 and that of the last 6 numbers is 37, find the sixth number.
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- 28
- 29
- 30
- 27
- 28
Correct Option: B
Given , Sum of 11 numbers = 35 × 11 = 385
Sum of the first 6 numbers = 32 × 6 = 192
and Sum of the next 9 numbers = 37 × 6 = 222
∴ Sixth number = Sum of the first 6 numbers + Sum of the last 6 numbers – Sum of 11 numbers
Sixth number= 192 + 222 – 385 = 29
