Advertisements
Advertisements
Question
In a single throw of a pair of different dice, what is the probability of getting a total of 9 or 11?
Solution
Total number of outcomes on throwing a pair of dice = 6 × 6 = 36
Let F be the event of getting a total of 9 or 11.
∴ Favourable outcomes = {(3, 6), (4, 5), (5, 4), (6, 3), (5, 6), (6, 5)}.
Number of favourable outcomes = 6
Now,
`P(F)=6/36=1/6`
Thus, the probability of getting a total of 9 or 11 is `1/6`
APPEARS IN
RELATED QUESTIONS
A card is drawn at random from a well-shuffled deck of playing cards. Find the probability that the card drawn is neither a jack nor a king.
A die is tossed once. Find the probability of getting an even number or a multiple of 3 ?
A box contains 80 discs which are numbered from 1 to 80. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.
All jacks, queens and kings are removed from a pack of 52 cards. The remaining cards are well-shuffled and then a card is randomly drawn from it. Find the probability that this card is a red card.
In a bag there are 44 identical cards with figure of circle or square on them. There are 24 circles, of which 9 are blue and rest are green and 20 squares of which 11 are blue and rest are green. One card is drawn from the bag at random. Find the probability that it has the figure of green square.
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3?
A number is selected from numbers 1 to 25. The probability that it is prime is
A die is thrown once. The probability of getting a prime number is
A box contains 25 cards numbered from 1 to 25. A card is drawn at random from the bag. Find the probability that the number on the drawn card is a prime number.
A bag contains 18 balls out of which x balls are red. If the ball is drawn at random from the bag, what is the probability that it is not red?
A bag contains 18 balls out of which x balls are red. If two more red balls are put in the bag, the probability of drawing a red ball will be `9/8` times the probability of drawing a red ball in the first case. Find the value of x.
All kings, queens and aces are removed from a pack of 52 cards. The remaining cards are well-shuffled and then a card is drawn from it. Find the probability that the drawn card is a red card.
In a certain race there are three boys A, B, C. The winning probability of A is twice than B and the winning probability of B is twice than C. If P(A) + P(B) + P(C) = 1, then find the probabilities of their winning.
Three identical coins are tossed together. What is the probability of obtaining:
all heads?
From 10 identical cards, numbered 1, 2, 3, ……, 10, one card is drawn at random. Find the probability that the number on the card drawn is a multiple of
3
A die is thrown once. Find the probability of getting:
a prime number
There are 1000 sealed envelopes in a box, 10 of them contain a cash prize of Rs 100 each, 100 of them contain a cash prize of Rs 50 each and 200 of them contain a cash prize of Rs 10 each and rest do not contain any cash prize. If they are well shuffled and an envelope is picked up out, what is the probability that it contains no cash prize?
A coin is tossed two times. The number of possible outcomes is ______.
A dice is rolled once. What is the probability that the number on top will be less than 1
Three coins are tossed simultaneously. What is the probability of getting at most one tail?
