If P(A)=2/5, P(B)=3/10 and P(A ∩ B) =51, then P(A'  B'). P(B'  A') is equal to
5/6
5/7
25/42
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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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2
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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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3
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Ten participants are participating in a competition. In how many ways can the first three prizes be won?
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4
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Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
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5
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If a team of 4 persons is to be selected from 8 males and 8 females, then in how many ways can the selections be made to include at least 1 female
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6
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From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least three men are in the committee. In how many ways can it be done?
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7
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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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8
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A coin is tossed 5 times. What is the probability that head appears an odd number of times?
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9
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A, B, C, and D are four points, any three of which are noncollinear. Then, the number of ways to construct three lines each joining a pair of points so that the lines do not form a triangle is
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10
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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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