Practicing Success
Practicing Success
CUET Preparation Today
Find the average of squares of natural numbers till 7. |
15 20 35 40 |
20 |
Average of squares = \(\frac{( x+1)(2x+1)}{6}\) = \(\frac{(7+1)(2×7+1)}{6}\) = \(\frac{(8×15)}{6}\) = 20 |
