A bag contains 2 pink, 3 red and 5 blue balls. Find the ratio of pink balls to the total number of balls.

5:1

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1:5

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10:2

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2:10

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Solution

The correct options are
B
1:5

D
2:10

Number of pink balls = 2
Total number of balls = 2 + 3 + 5 = 10
$∴$ Ratio of pink balls to the total number of balls
$= 2 : 10 = \frac{2}{10} = \frac{1}{5} = 1 : 5$

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2.A bag contains 5 red balls and some blue balls.If the probability of drawing a blue ball is double that of a red ball,find the number of blue balls in the bag.(Ans.10)

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A bag contains 2 pink, 3 red and 5 blue balls. Find the ratio of pink balls to the total number of balls.

The correct options are B 1:5 D 2:10 Number of pink balls = 2 Total number of balls = 2 + 3 + 5 = 10 ∴ Ratio of pink balls to the total number of balls =2:10=210=15=1:5

The correct options are
B
1:5

D
2:10

Number of pink balls = 2
Total number of balls = 2 + 3 + 5 = 10
$∴$ Ratio of pink balls to the total number of balls
$= 2 : 10 = \frac{2}{10} = \frac{1}{5} = 1 : 5$