Ex 15.1, 24 - Class 10
Last updated at Feb. 25, 2017 by Teachoo
Transcript
Ex 15.1, 24 A die is thrown twice. What is the probability that 5 will not come up either time? Total number of outcomes = 36 Total outcomes where 5 comes up = 11 Total outcomes where 5 will not come up = 36 โ 11 = 25 Probability that 5 will not come up either time = (๐๐๐ก๐๐ ๐๐ข๐ก๐๐๐๐๐ ๐คโ๐๐๐ 5 ๐ค๐๐๐ ๐๐๐ก ๐๐๐๐ ๐ข๐)/(๐๐๐ก๐๐ ๐๐ข๐๐๐๐ ๐๐ ๐๐ข๐ก๐๐๐๐๐ ) = 25/36 Ex 15.1, 24 A die is thrown twice. What is the probability that (ii) 5 will come up atleast once? Total number of outcomes = 36 Total outcomes where 5 comes up atleast once = 11 Probability that 5 will come up atleast once = (๐๐๐ก๐๐ ๐๐ข๐ก๐๐๐๐๐ ๐คโ๐๐๐ 5 ๐ค๐๐๐ ๐๐๐๐ ๐ข๐)/(๐๐๐ก๐๐ ๐๐ข๐๐๐๐ ๐๐ ๐๐ข๐ก๐๐๐๐๐ ) = 11/36
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About the Author
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.
