How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
16
24
36
48
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1
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What is the probability of getting at least one six in a single throw of three unbiased dice?s
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2
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A box contains two white balls, three black balls and four red balls. Balls of the same colour are distinct. The number of ways in which three balls can be drawn from the box if atleast one black ball is to be included in the draw, is
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3
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It is required to seat 5 boys and 4 girls in a row so that the girls occupy the even places. How many such arrangements are possible?
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4
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Four letters are selected from the word “CAPAME” and are rearranged to form four letter words. How many words can be formed?
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5
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There are seven pairs of black shoes and five pairs of white shoes. They are all put into a box and shoes are drawn one at a time. To ensure that at least one pair of black shoes are taken out, what is the number of shoes required to be drawn out?
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6
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If C(n, 7) = C(n, 5), find n
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7
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A number lock on a suitcase has 3 wheels each labeled with 10 digits from 0 to 9. If the opening of the lock is a particular sequence of three digits with no repeats, how many such sequences will be possible?
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8
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How many rectangles can be formed out of a chess board ?
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9
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One red flower, three white flowers, and two blue flowers are arranged in a line such that
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10
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Find the probability that a leap year selected at random will contain 53 Sundays
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