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The probability of selecting a rotten apple randomly from a heap of 350 apples is 0.18. What is the number of rotten apples in the heap?
...A bag contains 3 Green and 9 Red balls. One ball is drawn at random. What is the probability that the ball drawn is Red?
8 rotten bananas are accidentally mixed with 110 good ones. It is not possible to just look at a banana and tell whether or not it is rotten. One banana...
In a group of artists, there are 10 dancers and 8 singers. If four artists are to be selected at random, what is the probability that 2 dancers and 2 si...
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 alt...
There are (m + 6) red roses, (m + 12) white roses and ‘m’ pink roses in a bag. If the probability of picking a pink rose is 4/15, then find the valu...
Two cards are drawn at random from a pack of 52 cards. What is the probability that either both are black or both are queens?
A number is chosen at random from first 20 natural numbers. Find the probability that the chosen number is prime.
Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probabili...
A brother and a sister appear for an interview against two vacant posts in an office. The probability of the brother’s selection is 1/5 and that of th...