As the number of tosses of a coin increases,the ratio of the number of heads to the total number of tosses will be $\frac{1}{2}$. Is it correct? If not,write the correct one.
(B) No,it is not correct. As the number of trials increases,the experimental probability (the ratio of the number of heads to the total number of tosses) tends to get closer to $\frac{1}{2}$,but it is not necessarily exactly $\frac{1}{2}$ in every case.
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If a person is selected at random,find the probability that the person is under $60$ but over $39$ years.
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| Number of workers | $38$ | $27$ | $86$ | $46$ | $3$ |
If a person is selected at random,find the probability that the person is under $60$ but over $39$ years.
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