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Find the mean of the first five triangular numbers?
1. 5
2. 7
3. 6
4. 4

1 Answer

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Best answer
Correct Answer - Option 2 : 7

Given:

The first five triangular numbers

Formula used:

Mean = total number ÷ 5

Calculation

First five triangular numbers,

1, 3, 6, 10, 15

Then mean = (1 + 3 + 6 + 10 + 15) ÷ 5

= 35 ÷ 5 = 7 

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