Question : Find the average of the first fifteen multiples of 11.
Option 1: 55
Option 2: 35.5
Option 3: 88
Option 4: 77
Answer (1)
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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