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प्रश्न
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 an even number.
उत्तर
Sample Space (S) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
∴ n(S) = 15
Event A: the ticket shows an even number
A = {2, 4, 6, 8, 10, 12, 14}
∴ n(A) = 7
∴ `P (A) = (n(A))/(n(S))`
= `7/15`
Hence, the probability that the ticket shows an even number is `7/15`.
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संबंधित प्रश्न
There are 15 tickets bearing the numbers from 1 to 15 in a bag and one ticket is drawn from this bag at random. Write the sample space (S) and n(S).
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
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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 red ball.
A dice is thrown once. Find the probability of getting an even number.
Form a ‘Road safety commitee’ of two, from 2 boys (B1, B2) and 2 girls(G1, G2). Complete the following activity to write the sample space.
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(c) Committee of one boy and one girl =
Write sample space ‘S’ and number of sample point n(S) for the following experiment. Also write events A, B, C in the set form and write n(A), n(B), n(C).
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Event C : Prime number on the upper face.
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Event C : The same digit on both the upper faces.
If two dice are rolled simultaneously, find the probability of the following event.
The sum of the digits on the upper faces is at least 10.
If two dice are rolled simultaneously, find the probability of the following event.
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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 II : Decide the sample space yourself and fill in the following boxes.
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A die is thrown. Write the sample space. If P is the event of getting an odd number, then write the event P using set notation.
There are 9 tickets in a box, each bearing one of the numbers from 1 to 9.
One ticket is drawn at random from the box.
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Complete the following activity from the given information:
Activity:
S = {__________}
n(S) = ____________
A = {________}
n(A) = ___________
When a dice is thrown, the number of sample points in the sample space are ______
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Reason (R): The sample space for even numbers on a die is {2, 4, 6}.
