NCERT Class X Chapter 14: Probability Exercise 14.1 Question (9)

NCERT Class X Chapter 14: Probability Exercise 14.1 Question 9

Question:

A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be
(i) red ?
(ii) white ?
(iii) not green?

Given:

Number of red marbles = 5
Number of white marbles = 8
Number of green marbles = 4
Total number of marbles = 5 + 8 + 4 = 17

To Find:

(i) Probability of drawing a red marble
(ii) Probability of drawing a white marble
(iii) Probability of drawing a marble that is not green

Formula:

Probability = Number of favorable outcomes Total number of outcomes

Solution:

(i) Probability of drawing a red marble = 5 17

(ii) Probability of drawing a white marble = 8 17

(iii) Probability of drawing a marble that is not green = 5 + 8 17 = 13 17

Result:

(i) Probability of drawing a red marble = 5 17
(ii) Probability of drawing a white marble = 8 17
(iii) Probability of drawing a marble that is not green = 13 17

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