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Three boys and two girls stand in a queu...

Three boys and two girls stand in a queue. The probability, that the number of boys ahead is at least one more than the number of girls ahead of her, is `

A

`(1)/(2)`

B

`(1)/(3)`

C

`(2)/(3)`

D

`(3)/(4)`

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • 5 boys and 5 girls are siting in a row randomly . The probability that boys and girls sit alternately , is

    A
    `5/126`
    B
    `4/126`
    C
    `3/126`
    D
    `1/126`

  • To teach the chapter ratio and proportion in a class, the teacher asked the students of class X to make two groups of boys and girls to find the number of boys and girls. Class X has three sections A, B and C. The number of boys and girls in the three sections were found to be 24 and 32, 27 and 39 and 28 and 35, respectively. What is the ratio of number of girls and boys in section C?

    A
    `4 : 5`
    B
    ` 3 : 13`
    C
    ` 5 : 4`
    D
    `3 : 5`

  • To teach the chapter ratio and proportion in a class, the teacher asked the students of class X to make two groups of boys and girls to find the number of boys and girls. Class X has three sections A, B and C. The number of boys and girls in the three sections were found to be 24 and 32, 27 and 39 and 28 and 35, respectively. What is the reciprocal ratio of number of girls and boys in section C?

    A
    ` 5 : 4`
    B
    ` 13 : 3`
    C
    `4 : 5`
    D
    ` 5 : 3`

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