Question
The average of 12 numbers is 18. The average of the
first 5 numbers is 16 and the average of the last 6 numbers is 20. What is the remaining number?Solution
Total sum of 12 numbers = 12 x 18 = 216 Sum of first 5 numbers = 5 x 16 = 80 Sum of last 6 numbers = 6 x 20 = 120 Remaining number = 216 - 80 - 120 = 16
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