A) 55 |
B) 65 |
C) 45 |
D) 35 |
C) 45 |
As per the formula,
Average of the cubes of 1st 'n' natural numbers
= \( \Large \frac{n \left(n+1\right)^{2} }{4} \)
where, n = 5.
Therefore, Required average = \( \Large \frac{5 \left(5+1\right)^{2} }{4} \)
= \( \Large \frac{5 \times 36}{4} = 5 \times 9 = 45 \)