Question

Draw a pie diagram to represent the world population of countries given in the following table after determining the value of a.

Country	India	China	Russia	USA	Other	Total
Percentage of population	$15$	$20$	$a$	$a$	$25$	$100$

Answer 1

country $\%$

India $15$

china $20$

Russia $a$

USA $a$

Others $25$

Total $100$

$15$+$20+25$+$a$+$a$=$100$

$2a=100-60$

$a=20$

A$=\frac{15}{100}\times 360=54°$

B$=\frac{20}{100}\times 360=72°$

C$=\frac{20}{100}\times 360=72°$

D$=\frac{20}{100}\times 360=72°$

Others$=\frac{25}{100}\times 360=90°$