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Ex 15.1, 24 - A die is thrown twice. What is probability - Die

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Ex 15.1, 24 - Chapter 15 Class 10 Probability - Part 2

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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 – 11 = 25 Probability that 5 will not come up either time = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘œπ‘’π‘‘π‘π‘œπ‘šπ‘’π‘  π‘€β„Žπ‘’π‘Ÿπ‘’ 5 𝑀𝑖𝑙𝑙 π‘›π‘œπ‘‘ π‘π‘œπ‘šπ‘’ 𝑒𝑝)/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘œπ‘’π‘‘π‘π‘œπ‘šπ‘’π‘ ) = 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 = (π‘‡π‘œπ‘‘π‘Žπ‘™ π‘œπ‘’π‘‘π‘π‘œπ‘šπ‘’π‘  π‘€β„Žπ‘’π‘Ÿπ‘’ 5 𝑀𝑖𝑙𝑙 π‘π‘œπ‘šπ‘’ 𝑒𝑝)/(π‘‡π‘œπ‘‘π‘Žπ‘™ π‘›π‘’π‘šπ‘π‘’π‘Ÿ π‘œπ‘“ π‘œπ‘’π‘‘π‘π‘œπ‘šπ‘’π‘ ) = 11/36

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.