App Logo

No.1 PSC Learning App

1M+ Downloads
Calculate the average of the cubes of first 5 natural numbers

A55

B65

C45

D35

Answer:

C. 45

Read Explanation:

Average of the cubes of 1st 'n' natural numbers =n(n+1)²/4 = 5(5+1)²/4 = 5 x 9 = 45


Related Questions:

The sum of five numbers is 655. The average of the first two numbers is 75 and the third number is 128. Find the average of the remaining two numbers?
The sum of 10 numbers is 408. Find their average.
The average weight of 8 men is decreased by 3 kg when one of them whose weight is 56 kg is replaced by a new man. What is the weight of the new man?
If the phase difference between two component waves is other than quarter cycle, the resulting wave is said to be
In a class, 40 boys and their average age is five-sixth of the number of girls in that class and 30 girls and their average age is half of the number of boys in that class. Find the overall average in the class (Approximately)