# Means of first 10 whole numbers and first 10 natural numbers is in the ratio of

31 views

closed

Means of first 10 whole numbers and first 10 natural numbers is in the ratio of

A) 9: 11

B) 10 : 11

C) 11 : 10

D) 11 : 9

+1 vote
by (56.9k points)
selected by

Correct option is (A) 9: 11

Mean of first 10 whole numbers $=\frac{0+1+2+....+9}{10}$

$=\frac{9\times10}{20}=\frac92$

Mean of first 10 natural numbers $=\frac{1+2+3+....+10}{10}$

$=\frac{10\times11}{20}=\frac{11}2$

$\therefore$ Their ratio $=\cfrac{\frac92}{\frac{11}2}$

$=\frac9{11}$ = 9 : 11

+1 vote
by (42.4k points)

Correct option is   A) 9: 11