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Find the Mean of three consecutive triangular number.
1. 13/3
2. 10/3
3. 4
4. 3/10

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Correct Answer - Option 2 : 10/3

GIVEN:

Triangular number = n(n + 1)/2 where n = 1, 2, 3

FORMULA USED:

Mean = sum of all the data/ Total number

CALCULATION:

When n = 1, 2 , 3 then triangular number = 1, 3 and 6

⇒ Mean = summation of all the number/Total number

⇒ Mean = (1 + 3 + 6)/3

 ∴ Mean = 10/3

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