A polygon has 44 diagonals. What is the number of its sides?
7
8
9
11
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1
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In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?
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2
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If 18Cr = 18Cr+2 ; find rC5.
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3
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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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4
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In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
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5
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In how many different ways can the letters of the word 'DETAIL' be arranged in such a way that the vowels occupy only the odd positions?
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6
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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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7
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In a simultaneous throw of two dice, what is the probability of getting a total of 7?
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8
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A box contains 5 green, 4 yellow and 3 white marbles. three marbles are drawn at random. What is the probability that all they are not of the same colour?
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9
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There are seven pairs of black shoes and five pairs of white shoes. They are all put into a box and shoes are drawn one at a time. To ensure that at least one pair of black shoes are taken out, what is the number of shoes required to be drawn out?
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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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