NCERT Class X Chapter 14: Probability Example 2
NCERT Class X Chapter 14: Probability Example 2
Question:
A bag contains a red ball, a blue ball and a yellow ball, all the balls being of the same size. Kritika takes out a ball from the bag without looking into it. What is the probability that she takes out the following (i) yellow ball? (ii) red ball? (iii) blue ball?
Given:
A bag contains 3 balls: 1 red, 1 blue, and 1 yellow.
Number of red balls = 1
Number of blue balls = 1
Number of yellow balls = 1
Total number of balls = Number of red balls + Number of blue balls + Number of yellow balls = 3
Kritika picks one ball at random.
To Find:
The probability of picking (
i) a yellow ball,
(ii) a red ball, and
(iii) a blue ball.
Formula:
Probability = Number of favorable outcomes Total number of possible outcomes
Solution:
(i) Probability of picking a yellow ball:
Number of yellow balls = 1
Total number of balls = 3
Probability of picking a yellow ball = 1 3
(ii) Probability of picking a red ball:
Number of red balls = 1
Total number of balls = 3
Probability of picking a red ball = 1 3
(iii) Probability of picking a blue ball:
Number of blue balls = 1
Total number of balls = 3
Probability of picking a blue ball = 1 3
Result:
(i) Probability of picking a yellow ball = 1 3
(ii) Probability of picking a red ball = 1 3
(iii) Probability of picking a blue ball = 1 3
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