Question 3 - NCERT Exemplar - MCQ - Chapter 14 Class 10 Probability
Last updated at May 29, 2023 by Teachoo
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
Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
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 has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
Hi, it looks like you're using AdBlock :(
Displaying ads are our only source of revenue. To help Teachoo create more content, and view the ad-free version of Teachooo... please purchase Teachoo Black subscription.
Please login to view more pages. It's free :)
Teachoo gives you a better experience when you're logged in. Please login :)
Solve all your doubts with Teachoo Black!
Teachoo answers all your questions if you are a Black user!