Question 3 - NCERT Exemplar - MCQ - Chapter 14 Class 10 Probability

Last updated at Dec. 16, 2024 by

A bag contains 3 red balls, 5 white balls and 7 black balls. What is the probability that a ball drawn from the bag at random will be neither red nor black?

(A) 1/5   (B) 1/3   (C) 7/15   (D) 8/15

Slide5.JPG

Slide6.JPG

Go Ad-free

Transcript

Question 3 A bag contains 3 red balls, 5 white balls and 7 black balls. What is the probability that a ball drawn from the bag at random will be neither red nor black? (A) 1/5 (B) 1/3 (C) 7/15 (D) 8/15 Here, P (neither red nor black) = P (white ball) Now, Number of white balls = 5 Total Number of balls = 3 + 5 + 7 = 15 Thus, P (neither red nor black) = P (white ball) = (𝑁𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑤ℎ𝑖𝑡𝑒 𝑏𝑎𝑙𝑙𝑠)/(𝑇𝑜𝑡𝑎𝑙 𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑏𝑎𝑙𝑙𝑠) = 5/15 = 𝟏/𝟑 So, the correct answer is (B)

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo