NCERT Solutions for Class 10 Maths Chapter 15

Important NCERT Questions

PROBABILITY

NCERT Books for Session 2022-2023

CBSE Board and UP Board Others state Board

EXERCISE 9.1

Page No:308

Questions No:9

# 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?

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Total number of marbles = 5 + 8 + 4 = 17

/(i) Number of red marbles = 5

Probability of getting a red marble = (Number of favorable outcomes)/Number of total possible outcomes) = 5/17

(ii) Number of white marbles = 8

Probability of getting a white marble = (Number of favorable outcomes)/Number of total possible outcomes) = 8/17

(iii) Number of green marbles = 4

Probability of getting a green marble = (Number of favorable outcomes)/Number of total possible outcomes) = 4/17

Probability of not getting a green marble = 1 – 4/17 = 13/17