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Question 3
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## In a family of 3 children, the probability of having at least one boy is:

## (a) 7/8 (b) 1/8

## (c) 5/8 (d) 3/4

Last updated at Aug. 7, 2021 by Teachoo

Transcript

Question 3 In a family of 3 children, the probability of having at least one boy is: (a) 7/8 (b) 1/8 (c) 5/8 (d) 3/4 In a family of 3 children, the possible outcomes are BBB BBG BGB GBB BGG GBG GGB GGG Thus, Total number of outcomes = 8 Number of outcomes with atleast one boy = 7 Now, P(atleast one boy) = (๐(๐ด))/(๐(๐)) = 7/8 So, the correct answer is (a) Thus, Total number of outcomes = 8 Number of outcomes with atleast one boy = 7 Now, P(atleast one boy) = (๐๐ข๐๐๐๐ ๐๐ ๐๐ข๐ก๐๐๐๐๐ ๐ค๐๐กโ ๐๐ก๐๐๐๐ ๐ก 1 ๐๐๐ฆ)/(๐๐๐ก๐๐ ๐๐ข๐๐๐๐ ๐๐ ๐๐ข๐ก๐๐๐๐๐ ) = ๐/๐ So, the correct answer is (a)

Chapter 15 Class 10 Probability (Term 1)

Serial order wise

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.