Question 9 (ii)
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 white?

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Solution

Total number of marbles in the box = 5+8+4 = 17
Total Number of elementary events = 17
There are 8 white marbles in the box.
$∴$ Favourable number of elementary events = 8
$∴$ P(getting a white marble) = $\frac{8}{17}$

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Similar questions

Q. A box contains

5

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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?

Q. Question 9 (i)
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 red?

A bag contains 5 red marbles, 8 white marbles, 4 green marbles. What is the probability that if one marble is taken out of the bag at random, it will be

(i) red (ii) white (iii) not green

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Probability

Standard IX Mathematics

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Question 9 (ii) 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 white?

Total number of marbles in the box = 5+8+4 = 17 Total Number of elementary events = 17 There are 8 white marbles in the box. ∴ Favourable number of elementary events = 8 ∴ P(getting a white marble) = 817

Question 9 (ii)
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 white?

Total number of marbles in the box = 5+8+4 = 17
Total Number of elementary events = 17
There are 8 white marbles in the box.
$∴$ Favourable number of elementary events = 8
$∴$ P(getting a white marble) = $\frac{8}{17}$