Ritwik draws a ball from a bag that contains white and yellow balls- The probability of choosing a white ball is 2-9- If the total number of balls in the bag is 36- then find the number of yellow balls-

The probability of choosing a white ball = 2/9 Then, the probability of choosing a yellow ball = 1 2/9 = 9 2/9 = 7/9 Given, total number of balls in the bag = ...

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Standard VIII

Mathematics

Probability of an Event

Ritwik draws ...

Question

Question 89

Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is $\frac{2}{9} .$ If the total number of balls in the bag is 36, then find the number of yellow balls.

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Solution

The probability of choosing a white ball $= \frac{2}{9}$
Then, the probability of choosing a yellow ball $= 1 - \frac{2}{9} = \frac{9 - 2}{9} = \frac{7}{9}$
Given, total number of balls in the bag = 36
$∴$ Number of yellow balls $= \frac{7}{9} \times 36 = 28$

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Question 89 Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is 29. If the total number of balls in the bag is 36, then find the number of yellow balls.

The probability of choosing a white ball =29 Then, the probability of choosing a yellow ball =1−29=9−29=79 Given, total number of balls in the bag = 36 ∴ Number of yellow balls =79×36=28

Question 89

Ritwik draws a ball from a bag that contains white and yellow balls. The probability of choosing a white ball is $\frac{2}{9} .$ If the total number of balls in the bag is 36, then find the number of yellow balls.

The probability of choosing a white ball $= \frac{2}{9}$
Then, the probability of choosing a yellow ball $= 1 - \frac{2}{9} = \frac{9 - 2}{9} = \frac{7}{9}$
Given, total number of balls in the bag = 36
$∴$ Number of yellow balls $= \frac{7}{9} \times 36 = 28$