If 18Cr = 18Cr+2 ; find rC5.
56
63
49
42
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1
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A box contains 5 green, 4 yellow and 3 white marbles. three marbles are drawn at random. What is the probability that all they are not of the same colour?
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2
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If
SolutionAnswer :1/2 |
3
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Find the probability that a leap year selected at random will contain 53 Sundays
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4
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There are 20 people among whom two are sisters. Find the number of ways in which we can arrange them around a circle so that there is exactly one person between the two sisters.
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5
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In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
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6
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If a team of 4 persons is to be selected from 8 males and 8 females, then in how many ways can the selections be made to include at least 1 female
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7
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Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is
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8
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The number of circles that can be drawn out of 10 points of which 7 are collinear is
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9
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Find the number of ways in which mixed double tennis game can be arranged amongst 9 married couples if no husband and wife play in the same game
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10
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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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