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प्रश्न
A two digit number is formed with digits 2, 3, 5, 7, 9 without repetition. What is the probability that the number formed is a multiple of 5 ?
उत्तर
Sample Space (S) = {23, 25, 27, 29, 32, 35, 37, 39, 52, 53, 57, 59, 72, 73, 75, 79, 92, 93, 95, 97}
∴ n(S) = 20
Event B: the number is a multiple of 5
B = {25, 35, 75, 95}
∴ n(B) = 4
`therefore P (B) = (n(B))/(n(S))`
` = 4/20`
`=1/5`
Hence, the probability that the number is a multiple of 5 is `=1/5`.
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संबंधित प्रश्न
A card is drawn from the pack of 25 cards labeled with numbers 1 to 25. Write the sample space for this random experiment.
A bag contains 3 white, 5 black and 2 red balls, all of the same shape and size. A ball is drawn from the bag without looking into it, find the probability that the ball drawn
a black ball.
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For the following experiment write sample space ‘S’ and number of sample points n(S).
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In the month of March 2019, Find the days on which the date is a multiple of 5. (see the given page of the calender)
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(c) Committee of one boy and one girl =
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Condition for event A : The number formed is even
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Condition for event C : The number formed is greater than 50.
There are 15 tickets in a box, each bearing one of the numbers from 1 to 15. One ticket is drawn at random from the box. Find the probability of event that the ticket drawn - shows a number which is a multiple of 5.
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Activity : If two coins are tossed simultaneously
∴ s = {`square , "HT","TH", square`}
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∴ A = {`"HH" , square , "TH"`}
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Activity:
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Reason (R): The sample space for even numbers on a die is {2, 4, 6}.
