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A pair of unbiased dice are rolled toget...

A pair of unbiased dice are rolled together till a sum of either 5 or 7 is obtained. Then find the probability that 5 comes before 7.

Text Solution

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The correct Answer is:
`3//7`
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Pair o dice is rolled together till a sum of either 5 or 7 is obtained. Then the probability that 5 comes before 7 is _____

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Knowledge Check

  • Two unbiased dice are rolled. What is the probability of getting a sum which is neither 7 nor 11 ?

    A
    `7/9`
    B
    `(7)/(18)`
    C
    `(2)/(9)`
    D
    `(11)/(18)`

  • An unbiased coin is tossed. If the outcome is a head then a pair of unbiased dice is rolled and the sum of the coin results in tail, then a card from a well-shuffled pack of nine cards numbered 1,2,3,…….9 is randomly picked and the number on the card is noted. The probability that the noted number is either 7 or 8 is

    A
    `(15)/(72)`
    B
    `(13)/(36)`
    C
    `(19)/(72)`
    D
    `(19)/(36)`

  • A pair of dice is rolled. What is the probability of getting a sum of 2?

    A
    `1//6`
    B
    `1//3`
    C
    `1//36`
    D
    None of these

    • Similar Questions

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    A die is thrown twice. Find the probability that: 5 will not come up either time

    A unbiased coin is tossed. If the result is a head a pair of unbiased dice is rolled and the sum of the numbers obtained is noted. If the result is a tail, card from a well shuffled pack of eleven cards numbered 2, 3, 4, ………12 is picked and the number on the card is noted. What is the probability that the noted number is either 7 or 8?

    A pair of dice is thrown until either a sum of 4 or 6 appears. Find the probability that a sum of 8 occurs first.

    A pair of unbiased dice is rolled simultaneously. Find the probability of getting a difference of three.

    If two unbiased dice are rolled, find the probability that the total score is a prime number.

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