What will be the average of 16, 17, 18, ..... upto fifteen terms?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 23.
| Understanding/Application |
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Sum of the terms in the series = n[2a + (n - 1)d]/2 where n = number of terms, a = first term, d = difference between any two terms Sum of the terms = 15[2(16) + (15 - 1)1]/2 = 15[32 + 14]/2 = 15[23] = 345 |
| Average = 345/15 = 23 |