Instructions
In a box, there are several balls. The pie-chart shows the percentage-wise distribution of 5 different colours of balls; and total number of balls = 1000. Also, the ratio of the light and dark shades of the six colours of balls is given.
Question 48
What is the difference between number of light red balls and number of dark yellow balls?
Solution
Number of red balls = 21% of 1000 = 210
Ratio of light to dark red balls = 3:4
Number of light red balls = (3/7) * 210 = 90
Number of Yellow balls = 21% of 1000 = 210
Ratio of light to dark yellow balls = 9:5
Number of dark yellow balls = 75
Difference = 90 - 75 = 15
