Last updated at Feb. 25, 2017 by

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 β 11 = 25 Probability that 5 will not come up either time = (πππ‘ππ ππ’π‘πππππ π€βπππ 5 π€πππ πππ‘ ππππ π’π)/(πππ‘ππ ππ’ππππ ππ ππ’π‘πππππ ) = 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 = (πππ‘ππ ππ’π‘πππππ π€βπππ 5 π€πππ ππππ π’π)/(πππ‘ππ ππ’ππππ ππ ππ’π‘πππππ ) = 11/36

Ex 15.1

Ex 15.1, 1

Ex 15.1, 2 Important

Ex 15.1, 3

Ex 15.1, 4 (MCQ) Important

Ex 15.1, 5

Ex 15.1, 6 Important

Ex 15.1, 7

Ex 15.1, 8

Ex 15.1, 9

Ex 15.1, 10

Ex 15.1, 11

Ex 15.1, 12 Important

Ex 15.1, 13

Ex 15.1, 14 Important

Ex 15.1, 15 Important

Ex 15.1, 16

Ex 15.1, 17

Ex 15.1, 18 Important

Ex 15.1, 19 Important

Ex 15.1, 20* (Optional) Important

Ex 15.1, 21

Ex 15.1, 22 Important

Ex 15.1, 23

Ex 15.1, 24 Important You are here

Ex 15.1, 25 (i) Important

Ex 15.1, 25 (ii)

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.