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Find the Probability of Getting 5 Exactly Twice in 7 Throws of a Die. - Mathematics

Find the probability of getting 5 exactly twice in 7 throws of a die.

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Solution

The repeated tossing of a die are Bernoulli trials. Let X represent the number of times of getting 5 in 7 throws of the die.

Probability of getting 5 in a single throw of the die, p = 1/6

`:. q = 1 - p =1 - 1/6 = 5/6`

Clearly, X has the probability distribution with n = 7 and p = 1/6

 

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APPEARS IN

NCERT Class 12 Maths
Chapter 13 Probability
Q 11 | Page 578
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