What is the probability of getting at least one six in a single throw of three unbiased dice?s
91/216
1/216
200/216
17/216
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1
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There are 8 orators A, B, C, D, E, F, G, and H. In how many ways can the arrangements be made so that A always comes before B and B always comes before C.
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2
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If (n + 2)! = 2550 (n!); find ’n’
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3
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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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4
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The students in a class are seated, according to their marks in the previous examination. Once, it so happens that four of the students got equal marks and therefore the same rank. To decide their seating arrangement, the teacher wants to write down all possible arrangements one in each of separate bits of paper in order to choose one of these by lots. How many bits of paper are required?
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5
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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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6
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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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7
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If four dice are thrown together, then what is the probability that the sum of the numbers appearing on them is 25 ?
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8
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Three chairs are arranged in a row facing three other chairs. 4 boys and 2 girls are to be seated on these chairs such that girls are always facing each other. In how many ways can they be seated?
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9
Discuss

How many words, with or without meaning, can be formed using all letters of the word EQUATION using each letter exactly once?
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10
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If A, B and C are mutually exclusive and exhaustive events of a random experiment such that P(B)=3/2P(A) and P(C)=1/2P(B), then P(A∪C)=
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