Practice Probability Questions and Answers

• A bag contains 20 white and some black balls. If the probability of drawing a black ball from the bag is 2.5 times that of drawing a white ball, find the n...
• A bag contains 20 white and some black balls. If the probability of drawing a black ball from the bag is 6.25 times that of drawing a white ball, find the ...
• A bag contains 35 white and some black balls. If the probability of drawing a black ball from the bag is 1.8 times that of drawing a white ball, find the n...
• A bag contains 20 white and some black balls. If the probability of drawing a black ball from the bag is 1.3 times that of drawing a white ball, find the n...
• A bag contains 24 white and some black balls. If the probability of drawing a black ball from the bag is 1.5 times that of drawing a white ball, find the n...
• A bag contains 8 white and some black balls. If the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the number...
• A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 3 black and 9 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 9 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 8 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 10 black and 12 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 14 black and 16 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 16 black and 18 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 18 black and 20 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• A bag contains 20 black and 22 white balls. One ball is drawn at random. What is the probability that the ball drawn is white? ...
• Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probability that al...
• In a lottery, there are 4 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize?
• In a lottery, there are 8 prizes and 20 blanks. A lottery is drawn at random. What is the probability of getting a prize? ...
• In a lottery, there are 11 prizes and 22 blanks. A lottery is drawn at random. What is the probability of getting a prize? ...
• In a lottery, there are 6 prizes and 30 blanks. A lottery is drawn at random. What is the probability of getting a prize? ...
• In a lottery, there are 11 prizes and 30 blanks. A lottery is drawn at random. What is the probability of getting a prize?
• A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one blue...
• A question is given to Saket, Ankush and Prem. Probability that Saket, Ankush and Prem can solve the question is 1/3, 2/5 and 1/2. Find the probability tha...
• A bag has 7 pink, 4 black and 3 yellow balls while another bag has 5 pink, 6 yellow and 3 blue balls. A bag is selected at random and a ball drawn out of i...
• A box contains 5 blue jellies, some red jelly and rest yellow jelly. The probability of picking a red ball at random is 3/10, while the probability of pick...
• Determine the probability that when a hand of 7 cards is drawn from a box of 52 cards, it consists at least 3 kings?
• One summer peter visits 4 villages (A, B, C and D) in a random order. Find the probability that he visits (i) A before B (ii) A before B and B before C res...
• Two dancers Seema and Reema appeared in audition of a dance competition. The probability that seema will be selected in this dance competition is 0.05 and ...
• Given that E and F are events such that P(E) = 0.8, P(F) = 0.4 and P(E∩ F) = 0.2. Find P(F|E).
• Ten tickets numbered 1 to 15 are placed in a box, mixed up thoroughly and then one ticket is drawn randomly. If it is known that the number on the drawn ti...
• If an event E has more than one possible outcomes, it is called a ______
• In a factory which manufactures calculators, machines A, B and C manufacture respectively 25%, 35% and 40% of the calculators. Of their outputs, 5, 4 and 2...
• Suppose p and q be two real functions continuous at a real number t. Then which of the following is true
• A box contains 5 blue jellies, some red jelly and rest yellow jelly. The probability of picking a red ball at random is 3/10, while the probability of pick...
• From a bag containing 12 white and 15 yellow ribbons, find the probability of picking 2 ribbons of each type at random.
• Three Marbles and three balls are kept in a box. If two items are chosen at random, Find the probability that one is marble and another one is ball?
• A vessel contains 5 red, ‘x’ green and 3 blue ribbons. If two ribbons are drawn from the vessel randomly, then the probability of getting a red and a g...
• A box contains 8 yellow marbles, ‘x’ blue marbles and 12 white marbles. A box contains 5 yellow marbles, 2 blue marbles and 3 white marbles. The probab...
• A biased six-faced dice when thrown, is thrice as likely to show an odd number than an even number. If it is thrown twice, then the probability that the su...