- A18
- B40
- C20
- D22
Step-by-Step Solution
Total sum = . Sum of five = 10+12+14+16+18 = 70. Sixth = 90 - 70 = 20.
Answer: C) 20
The mean of 6 observations is 15. If five of them are 10, 12, 14, 16 and 18, find the sixth observation.
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