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In a lottery, there are 11 prizes and 22 blanks. A lottery is drawn at random. What is the probability of getting a prize?
...There are 30 cars standing in a parking lot which consist of silver, grey and white cars. The number of grey and white cars are equal, and the number of...
If n(A) = 25, n(B) = 40 and n(A ∪ B) = 50, then n(A ∩ B) equals
Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probabili...
A poly-bag contains (3a - 4) red, (2a - 3) white, and (a - 1) black rubber bands. Two rubber bands are drawn randomly from the bag, and the probability ...
The names of 8 students from section A, 9 students from section B and 10 students from section C were selected. The age of all the 27 students was diffe...
If the letters of the word HORIZON be arranged at random, what is the probability that vowels are not together?
If two socks are chosen at random, what is the probability that either all are green or all are black socks?
A bag contains 9 blue balls, 16 red balls, and 20 green balls. One ball is drawn at random. Find the probability that the ball drawn is either blue or g...
Out of three girls and five boys, five children are to be randomly selected for a dance programme. What is the probability that all the selected childre...
