A die is rolled andlsquo;nandrsquo; times until 4 appears then the probability that die must rolled more than 5 times before getting a andldquo;4andrdquo;,a)b)c)d)Correct answer is option 'A'. Can you explain this answer?

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A die is rolled ‘n’ times until 4 appears then the probability that die must rolled more than 5 times before getting a “4”,

Correct answer is option 'A'. Can you explain this answer?

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Practice Test: Electronics Engineering (ECE)- 12

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A die is rolled ‘n’ times until 4 appears then the probabi...

probability of Getting ‘4’ on rolling a die is = ⅙

So, Probability of Not getting ‘4’ is = ⅚

To getting success (get-4), die must be rolled more than 5 times

So,

P(x > 5) = 1 − P(x ≤ 5)

Getting success in st trial

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A die is rolled ‘n’ times until 4 appears then the probability that die must rolled more than 5 times before getting a “4”,a)b)c)d)Correct answer is option 'A'. Can you explain this answer?

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