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Question
The mean of five numbers is 50, out of which mean of 4 numbers is 46, find the 5th number:
Options
4
20
434
66
Solution
Since, the mean of five numbers is 50, out of which mean of 4 numbers is 46
So, the 5th number
= Sum of 5th Observation - Sum of 4th Observations
= (50 × 5) - (46 × 4)
= 250 - 184
= 66
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