Question
The average of 5 numbers is 42.
When one of the numbers is excluded, the average of the remaining four numbers becomes 38. Determine the value of the number that was excluded?Solution
ATQ,
Let the excluded number be 'a' So, 42 Γ 5 = 38 Γ 4 + a Or, 210 = 152 + a Or, a = 58
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