$80$ bulbs are selected at random from a lot and their lifetime (in $hrs$) is recorded in the form of a frequency table given below:
Lifetime (in hours) $300$ $500$ $700$ $900$ $1100$ Frequency $10$ $12$ $23$ $25$ $10$
One bulb is selected at random from the lot. The probability that its lifetime is $1150$ hours is:
| Lifetime (in hours) | $300$ | $500$ | $700$ | $900$ | $1100$ |
| Frequency | $10$ | $12$ | $23$ | $25$ | $10$ |
One bulb is selected at random from the lot. The probability that its lifetime is $1150$ hours is:
- A$\frac{1}{80}$
- B$0$
- C$\frac{7}{16}$
- D$1$
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$(2)$ The probability of the month of March having $5$ Sundays is $\frac{1}{7}$.
$(3)$ If the probability of an event $A$ occurring is $\frac{3}{7}$,then the probability of event $A$ not occurring is $\frac{4}{7}$.
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