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Ex 13.1, 14 - Find probability 'sum of numbers on dice is 4' - Ex 13.1


  1. Chapter 13 Class 12 Probability
  2. Serial order wise
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Ex 13.1, 14 Given that the two numbers appearing on throwing two dice are different. Find the probability of the event ‘the sum of numbers on the dice is 4’. Two Dice are thrown We need to find the Probability that the sum of numbers on the dice is 4, given that the two numbers are different. E : Sum of numbers is 4 F : numbers are different We need to find P(E | F) Now, P(E|F) = 𝑃(𝐸 ∩ 𝐹)﷮𝑃(𝐹)﷯ = 2﷮36﷯﷮ 30﷮36﷯﷯ = 2﷮30﷯ = 𝟏﷮𝟏𝟓﷯

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Mathematics from Class 9 to 12. You can ask questions here.