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12th CBSE
IMPORTANT
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A purse contains 2 silver and 4 copper coins. A second purse contains 4 silver and 3 copper coins. If a coin is pulled at random from one of the two purses, what is the probability that it is a silver coin?

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Important Questions on Probability

MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 3
One bag contains 4 yellow and 5 red balls. Another bag contains 6 yellow and  3 red balls. A ball is transferred from the first bag to the second bag and then a ball is drawn from the second bag. Find the probability that ball drawn is yellow.
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 4
A bag contains 3 white and 2 black balls and another bag contains 2 white and 4 black balls. One bag is chosen at random. From the selected bag, one ball is drawn. Find the probability that the ball drawn is white.
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 5
The contents of three bags I, II and III are as follows:
Bag I : 1 white, 2 black and 3 red balls,
Bag II : 2 white, 1 black and 1 red ball;
Bag III : 4 white, 5 black and 3 red balls.
A bag is chosen at random and two balls are drawn. What is the probability that the balls are white and red?
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 6
An unbiased coin is tossed. If the result is a head, a pair of unbiased dice is rolled and the sum of the numbers obtained is noted. If the result is a tail, a card from a well shuffled pack of eleven cards numbered 2, 3, 4, ..., 12 is picked and the number on the card is noted. What is the probability that the noted number is either 7 or 8?
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 7
A factory has two machines A and B. Past records show that the machine A produced 60% of the items of output and machine B produced 40% of the items. Further 2% of the items produced by machine A were defective and 1% produced by machine B were defective. If an item is drawn at random, what is the probability that it is defective?
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 8
The bag A contains 8 white and 7 black balls while the bag B contains 5 white and 4 black balls. One ball is randomly picked up from the bag A and mixed up with the balls in bag B. Then a ball is randomly drawn out from it. Find the probability that ball drawn is white.
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 9
A bag contains 4 white and 5 black balls and another bag contains 3 white and 4 black balls. A ball is taken out from the first bag and without seeing its colour is put in the second bag. A ball is taken out from the latter. Find the probability that the ball drawn is white.
MEDIUM
12th CBSE
IMPORTANT
MATHEMATICS CLASS XII VOLUME-2>Chapter 12 - Probability>EXERCISE>Q 10
One bag contains 4 white and 5 black balls. Another bag contains 6 white and 7 black balls. A ball is transferred from first bag to the second bag and then a ball is drawn from the second bag. Find the probability that the ball drawn is white.