Which one of the following is the average of first five multiples of each of the numbers from 11, 12, 13, ..., 20?

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Q: 52 (CAPF/2024)
Which one of the following is the average of first five multiples of each of the numbers from 11, 12, 13, ..., 20?

question_subject: 

Mathematics

question_exam: 

CAPF

To find the average, calculate the sum of the multiples of numbers from 11 to 20, then divide by the number of terms. The formula for the sum of multiples is \(n(n + 1)/2\). After computation, the average simplifies to 46.5.