How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated
5
10
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20
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1
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If (n + 2)! = 2550 (n!); find ’n’
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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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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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4
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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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5
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Six boys and 4 girls are to be seated in two separate rows with five chairs each, such that two particular girls are always together and all the girls are not in the same row. In how many ways can they be seated?
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6
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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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7
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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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8
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How many four-digit numbers, each divisible by 4 can be formed using the digits 5, 6, 7, 8, 9, repetition of digits being allowed in any number?
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9
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If A and B are two independent events with P(A) = 3/5 and P(B) = 4/9 , then P(A' ∩ B' ) equals
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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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