If A is the average of first 5 natural numbers and B is the average of first 5 natural square numbers, then what is the average of A and B?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 7.
We know that,
Average = Sum of observations/Number of observations
⇒ A = (1 + 2 + 3 + 4 + 5)/5 = 15/5 = 3
⇒ B = (1 + 4 + 9 + 16 + 25)/5 = 11
Average of A and B = (3 + 11)/2 = 14/2 = 7