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प्रश्न
In a single throw of a dice, find the probability of getting a prime number.
उत्तर
Sample space = {1, 2, 3, 4, 5, 6}
n(S) = 6
E = event of getting a prime number = {2, 3, 5}
n(E) = 3
Probability of getting a prime number = P(S)
= `(n(E))/(n(S))`
= `3/6`
= `1/2`
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Event C : Prime number on the upper face.
If two dice are rolled simultaneously, find the probability of the following event.
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Two coins are tossed simultaneously. Complete the following activity of writing of the sample space (S) and expected outcomes of the events :
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Activity : If two coins are tossed simultaneously
∴ s = {`square , "HT","TH", square`}
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∴ B = {`square`}
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If one coin is tossed, write the sample space ‘S’.
Assertion (A): A die is thrown once and the probability of getting an even number is `2/3`.
Reason (R): The sample space for even numbers on a die is {2, 4, 6}.
