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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. On...
A bag contains 7 green balls, 5 blue balls, and 10 yellow balls. A box contains 3 green balls and 8 yellow balls. A ball is randomly drawn from the box ...
The names of 17 students from section A, 18 students from section B and 19 students from section C were selected. The age of all the 54 students was dif...
A bag contains 10 white and some black balls. If the probability of drawing a black ball from the bag is 2 times that of drawing a white ball, find the ...
In a class, there are 16 boys and 24 girls. One of them is called out by an enroll number. What is the probability that the one called is a girl?
A bag contains 5 red balls, 6 blue balls, and 9 green balls. Two balls are drawn at random without replacement. What is the probability that both balls ...
A coin is tossed 9 times. Find the probability of almost 2 tails.
What is the Probability of getting a sum of ‘9’ on rolling a dice twice?
A box contains 4 red, 9 green, 5 yellow, and 2 white marbles. If a single marble is chosen at random from the box, what is the probability that it is gr...
A box contains only three colors of balls- red, green and blue. What is the minimum number of balls that should be picked from the box to ensure that at...
