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1000 families with 2 children were selec...

1000 families with 2 children were selected randomly and the following data were recorded.
`|{:("Number of boys in a family"," 0 1 2"),("Number of families"," 140 560 300"):}|`
If a family is chosen at random, find the probability that it has (i) no boy (ii) one boy (iii) two boys (iv) at least one boy (v) at most one boy.

Text Solution

Verified by Experts

Total number of outcomes=1000
1)`P(0B)=140/1000=7/50`
2)`P(1B)=560/1000=14/25`
3)`P(2B)=300/1000=3/10`.
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1500 families with 2 children were selected randomly,and the following data were recorded:

1000 families with 2 children were selected randomly, and the following data were recorded: N u m b e r\ of\ boy s\ in\ a\ fa m i l y : 0 1 2 N u m b e r\ of\ fa m i l i e s : 140 560 300 If a family is chosen at random, find the probability that it has (i) No boy (ii) one boy (iii) 2 boys (iv) at least one boy (v) at most one boy

Knowledge Check

  • In a locality 100 families were chosen at random and the following data was collected: |{:("Number of childeren"," 0 1 2 3 4 or more"),("is each family",),("Number of families"," 3 40 45 12 0"):}| If a family is chosen at random, find the probability that the chosen family has 3 or more children.

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    B
    `(3)/(25)`
    C
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    D
    `(1)/(5)`

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