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
1
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1
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Find the probability that a leap year selected at random will contain 53 Sundays
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2
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Find the number of ways in which mixed double tennis game can be arranged amongst 9 married couples if no husband and wife play in the same game
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3
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There are 6 letters for 3 envelopes. In how many different ways can the envelopes be filled?
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4
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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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5
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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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6
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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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7
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What is the probability of getting at least one six in a single throw of three unbiased dice?s
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8
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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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9
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The number of triangles that can be formed by choosing the vertices from a set of 12 points, seven of which lie on the same straight line, is
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10
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In how many ways the letters of the word “UNDERDOG” can be arranged such that the first and last letters are same and no two vowels are together?
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