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Question

A weather station recorded the temperatures of a place over a period of 7 days as follows:

Day Temperature (in C )
Monday 45
Tuesday 38
Wednesday 40
Thursday 42
Friday 41
Saturday 37
Sunday 36

Find the probability of a day having a temperature of more than 40 C.

A
27
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B
57
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C
47
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D
37
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Solution

The correct option is D 37
Here, the total number of days = 7
Event, E = A day having a temperature of more than 40C.
It can be seen there are only 3 days where the temperature is more than
40C, namely, Monday, Thursday and Friday.
Therefore, number of days where event happened = 3
We know,
P(E)=Number of trials in which the event happenedTotal number of trials =37

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