App Logo

No.1 PSC Learning App

1M+ Downloads
What is the average of first 49 natural numbers?

A45

B50

C25

D60

Answer:

C. 25

Read Explanation:

Average = sum/number = {n(n+1)/2}/n = n + 1/2 = (49 + 1)/2 = 50/2 = 25


Related Questions:

The average of nine numbers is 60, that of the first five numbers is 55 and the next three is 65. The ninth number is 10 less than the tenth number. Then, tenth number is –
Pinky bought 25 books at the rate of ₹14 each, 40 pens at the rate of ₹7 each and 15 pencils at the rate of ₹6 each. Calculate the average price (in ₹) of all the stationery goods.
The average of ten number is 7. if every number is multiplied with 12 then the average will be ?
Four years ago average age of A and B was 18 years now the average age of A,B and C are 24 yrs then after 8 yrs age of C will be ?
The total marks obtained by a student in Physics, Chemistry and mathematics together is 150 more than the marks obtained by him in Chemistry. What are the average marks obtained by him in Physics and Mathematics together?