If (n + 2)! = 2550 (n!); find ’n’
49
35
38
43
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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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In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
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3
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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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4
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If 18Cr = 18Cr+2 ; find rC5.
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5
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How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
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6
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If P(A)=2/5, P(B)=3/10 and P(A ∩ B) =51, then P(A' | B'). P(B' | A') is equal to
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7
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In how many ways can a cricketer can score 200 runs with fours and sixes only?
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8
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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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9
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If C(n, 7) = C(n, 5), find n
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10
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In how many different ways can the letters of the word 'MATHEMATICS' be arranged so that the vowels always come together
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