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प्रश्न
A two digit number is to be formed from the digits 0,1,2,3,4,
without repetition of the digits. Find the probability that the number so
formed is a prime number
उत्तर
The sample space,
S = {10,12,13,14,20,21,23,24,30,31,32,34,40,41,42,43}
∴ n(S) = 16
Let A be the event that the number is a prime.
∴ A = {13,23,31,41,43}
∴ n(A) = 5
∴ `P(A) = (n(A))/(n(S)) = 5/16`
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संबंधित प्रश्न
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Condition for event C : Number on the upper face is greater than 7 and tail on the coin.
If two dice are rolled simultaneously, find the probability of the following event.
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Do the following activity -
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Activity:
Two coins are tossed simultaneously.
∴ Sample space is
S = `{square, HT, TH, square}`
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∴ A = `{square, HT, TH}`
Event B: To get no head.
∴ B = `{square}`
