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Practice Probability Questions and Answers

In a box there are 12 orange, 5 white, and 7 blue balls. One ball is picked up randomly. What is the probability that it is neither white nor blue?...
A bag contains 7 red gems, 8 yellow gems and 5 green gems . 3 gems are drawn randomly. What is the probability that the gem...
A bag contains 5 red bottles, 6 yellow bottles and 8 green bottles . 3 bottles are drawn randomly. What is the probability that ...
A bag contains 10 red books, 7 yellow books and 7 green books . 3 books are drawn randomly. What is the probability that the&nbs...
A bag contains 5 red books, 7 yellow books and 7 green books . 3 books are drawn randomly. What is the probability that the ...
What will be the probability of choosing one red and one green ball from a basket containing 4 red and 5 green balls if two balls are drawn randomly?
A bag contains 6 balls of which 3 are red and 3 are black. They are drawn successively without replacement. What is the probability that colors are alterna...
There are 4 red balls, 5 blue balls and 3 green balls in a jar. 2 balls are drawn at random. Find the probability that both balls are either green or red.
22 defective pens are accidentally mixed with 136 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is t...
24 defective pens are accidentally mixed with 120 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is t...
The probability of selecting a rotten apple randomly from a heap of 900 apples is 0.18. What is the number of rotten apples in the heap? ...
The probability of selecting a rotten apple randomly from a heap of 600 apples is 0.14. What is the number of rotten apples in the heap?
The probability of selecting a rotten apple randomly from a heap of 250 apples is 0.20. What is the number of rotten apples in the heap? ...
The probability of selecting a rotten apple randomly from a heap of 1050 apples is 0.36. What is the number of rotten apples in the heap?
The probability of selecting a rotten apple randomly from a heap of 150 apples is 0.28. What is the number of rotten apples in the heap?
The probability of selecting a rotten apple randomly from a heap of 100 apples is 0.20. What is the number of rotten apples in the heap? ...
A bag contains 15 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, find the numb...
A bag contains 12 white and some black balls. If the probability of drawing a black ball from the bag is thrice that of drawing a white ball, find the numb...
A bag contains 13 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 numbe...
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? ...

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