How many fourdigit numbers, each divisible by 4 can be formed using the digits 5, 6, 7, 8, 9, repetition of digits being allowed in any number?
75
100
125
150
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1
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12 person are seated at a round table. Number of ways of selecting 2 persons not adjacent to each other is
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2
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If C(n, 7) = C(n, 5), find n
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3
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The number of triangles that can be formed by choosing the vertices from a set of 12 points, seven of which lie on the same straight line, is
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4
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There are three rooms in a motel: one single, one double, and one for four persons. How many ways are there to house seven persons in these rooms?
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5
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How many rectangles can be formed out of a chess board ?
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6
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If (n + 2)! = 2550 (n!); find ’n’
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7
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A coin is tossed 5 times. What is the probability that head appears an odd number of times?
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8
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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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9
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In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?
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10
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Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
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