Two coins are tossed $1000$ times and the outcomes are recorded as below:
Number of heads $2$ $1$ $0$ Frequency $200$ $550$ $250$
Based on this information,the probability for at most one head is
| Number of heads | $2$ | $1$ | $0$ |
| Frequency | $200$ | $550$ | $250$ |
Based on this information,the probability for at most one head is
- A$\frac{4}{5}$
- B$\frac{1}{4}$
- C$\frac{1}{5}$
- D$\frac{3}{4}$
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$1000$ families with $2$ children were selected randomly,and the following data were recorded:
Number of girls in a family $0$ $1$ $2$ Number of families $128$ $672$ $200$
Compute the probability of a family,chosen at random,having $(1)$ two girls,$(2)$ one girl.
| Number of girls in a family | $0$ | $1$ | $2$ |
| Number of families | $128$ | $672$ | $200$ |
Compute the probability of a family,chosen at random,having $(1)$ two girls,$(2)$ one girl.
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If a person is selected at random,find the probability that the person is under $40$ years.
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View SolutionOver the past $200$ working days,the number of defective parts produced by a machine is given in the following table:
Number of defective parts $0$ $1$ $2$ $3$ $4$ $5$ $6$ $7$ $8$ $9$ $10$ $11$ $12$ $13$ Days $50$ $32$ $22$ $18$ $12$ $12$ $10$ $10$ $10$ $8$ $6$ $6$ $2$ $2$
Determine the probability that tomorrow's output will have not more than $5$ defective parts.
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Determine the probability that tomorrow's output will have not more than $5$ defective parts.
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