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Two Dice Are Thrown Simultaneously. What is the Probability That: 4 Will Not Come up Either Time? 4 Will Come up at Least Once? - ICSE Class 10 - Mathematics

ConceptProbability - A Theoretical Approach

Question

Two dice are thrown simultaneously. What is the probability that:

4 will not come up either time?

4 will come up at least once?

Solution

When two dice are thrown , total possible outccomes=36

Favorable outcomes for 4 will not come up either time:

{(1,1)(1,2)(1,3)(1,5)(1,6)}

{(2,1)(2,2)(2,3)(2,5)(2,6)}

{(3,1)(3,2)(3,3)(3,5)(3,6)}

{(5,1)(5,2)(5,3)(5,5)(5,6)}

{(6,1)(6,2)(6,3)(6,5)(6,6)}

Number of favorable  outcomes = 25

p(4 will not come up) = 25/36

P(4 will come up ones) = 1- p(4 will not come up either time)

p(4 will come up once) = 1-25/36

p(4 will come up once) = (36-25)/36=11/36

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Solution Two Dice Are Thrown Simultaneously. What is the Probability That: 4 Will Not Come up Either Time? 4 Will Come up at Least Once? Concept: Probability - A Theoretical Approach.
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