A coin is tossed 5 times. What is the probability that head appears an odd number of times?
1/2
2/3
1/3
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1
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In a single throw with four dice,the probability of throwing seven is
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2
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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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3
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If (n + 2)! = 2550 (n!); find ’n’
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4
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If C(n, 7) = C(n, 5), find n
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5
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What is the sum of all 4 digit numbers that can be formed by the digits 1, 2, 3, 4 each exactly once
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6
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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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7
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Three unbiased coins are tossed. What is the probability of getting at most two heads ?
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8
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A fair coin is tossed 5 times. What is the probability of getting at least three heads on consecutive tosses?
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9
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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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10
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How many natural numbers can be made with digits 0, 7, 8 which are greater than 0 and less than a million?
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