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A room contains 3 sockets for bulbs. If ...

A room contains 3 sockets for bulbs. If from a collection of 10 bulbs, out of which 6 are defective, 3 bulbs are selected at random and put in the sockets, then the probability that the room is lighted is

A

`3/5`

B

`1/5`

C

`5/6`

D

`1/6`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • If 3 bulbs are selected from 12 bulbs of which 6 are good, then probability that at least one of them is good is

    A
    `1/11`
    B
    `10/11`
    C
    `9/11`
    D
    `7/11`

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    A
    `(2)/(25)`
    B
    `(9)/(20)`
    C
    `(1)/(25)`
    D
    `(1)/(45)`

  • A box contains 100 bulbs , out of which 10 are defective. A sample of 5 bulbs is drawn. The probability that none is defective ,is

    A
    `9/10`
    B
    `(1/10)^5`
    C
    `(9/10)^5`
    D
    `(1/2)^5`

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