The arithmetic mean (average) of the first 10 whole numbers is Options: A . &nbsp4.5 B . &nbsp5.5 C . &nbsp4 D . &nbsp5

The arithmetic mean (average) of the first 10 whole numbers is

Question

The arithmetic mean (average) of the first 10 whole numbers is

Options:

A . 4.5

B . 5.5

C . 4

D . 5

Answer: Option A
Answer: (a)Using Rule 1,Average of numbers = ${x_1+x_2+…+x_n}/n$Required average= ${0+1+2+3+…+9}/10$${9× (9+1)}/{2×10}$ = 4.5

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