Four letters are selected from the word “CAPAME” and are rearranged to form four letter words. How many words can be formed?
120
90
180
192
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1
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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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2
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If ^{18}C_{r }= ^{18}C_{r+2 }; find ^{r}C_{5}.
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3
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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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4
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If (n + 2)! = 2550 (n!); find ’n’
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5
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In how many ways can a cricketer can score 200 runs with fours and sixes only?
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6
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In how many ways can 10 people line up at a ticket window of a railway station?
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7
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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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8
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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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9
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Find the probability that a leap year selected at random will contain 53 Sundays
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10
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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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