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The mean of 20 items is 55. If two items 45 and 30 are removed, the new mean of the remaining items is
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- 65.1
- 65.3
- 56.9
- 56
- 65.1
Correct Option: C
Here , The mean of 20 items = 55.
If two items 45 and 30 are removed, then
Sum of 18 items = 55 × 20 – 45 – 30
Sum of 18 items = 1100 – 75 = 1025
| ∴ Required average = | |
| 18 |
Required average = 56.9
