Question

If a basket contains 15 balls where the ratio of red balls to blue balls is 1 : 2, what is the difference between the number of red balls to blue balls?

• A. 3
• B. 5
• C. 10
• D. 1

Answer 1

The correct option is B 5

Sum of terms of ratio = 1 : 2 = 3

$\Rightarrow$ Value of 3 parts = 15 balls
$\Rightarrow$ Value of 1 part = 5 balls

Number of red balls = Value of 1 part = 5 ball
Number of blue balls = Value of 2 parts
= 10 balls
$\therefore$ Difference in the number of balls = (10 - 5) = 5 balls