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Question : Find the average of the first fifteen multiples of 11.

Option 1: 55

Option 2: 35.5

Option 3: 88

Option 4: 77


Team Careers360 15th Jan, 2024
Answer (1)
Team Careers360 24th Jan, 2024

Correct Answer: 88


Solution : The first fifteen multiples of 11 are 11, 22, 33,..., 165.
The average of an arithmetic series is the average of the first and last term.
Average = $\frac{\text{First term + Last term}}{2} = \frac{11 + 165}{2}$ = 88
Hence, the correct answer is 88.

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