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In a sample survey of 645 people , it wa...

In a sample survey of `645` people , it was found that `516` people have a high school certificate . If a person is chosen at random , what is the probability that he/she has a high school certificate ?

A

`(1)/(2)`

B

`(3)/(5)`

C

`(7)/(10)`

D

`(4)/(5)`

Text Solution

Verified by Experts

The correct Answer is:
D
Let E be the event that the chosen person has a high school certificates . Then ,
`P(E) = ("number of people having high school certificate")/("total number of people")`
`= (516)/(645) = (4)/(5)` . [HCF (516 , 645) = 129. ]
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Knowledge Check

  • In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate, is

    A
    `0.5`
    B
    `0.6`
    C
    `0.7`
    D
    `0.8`

  • In a sample study of 642 people, it was found that 514 people have a high school certificate. If a person is selected at random, the probability that the person do not have a high school certificate is

    A
    `251//321`
    B
    `253//321`
    C
    `251//329`
    D
    `64//321`

  • In a general survey of 832 people, it was found that 624 owned a car. If a person is selected randomly. what is the probability that the person will not be an owner of a car?

    A
    1.33
    B
    0.25
    C
    0.75
    D
    0.4

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