The mean of 7 numbers is 25. If one more number is excluded , mean of the new set of number becomes 27. Find the excluded number?
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Answer:
41
Step-by-step explanation:
Mean = Sum of all observation ÷ Number of Observation
25 = Sum ÷ 7
Sum of all observation = 25 × 7
= 175
Mean = Sum of all observation ÷ Number of Observation
27 = Sum of observation ÷ 8 (7+1)
Sum of Observation = 8 × 27
= 216
Therefore, the excluded number is 216-175 =41
Hope it helps you
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