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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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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Seven different objects must be divided among three people. In how many ways can this be done if one or two of them must get no objects?
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How many parallelograms will be formed if 7 parallel horizontal lines intersect 6 parallel vertical lines?
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There are three rooms in a motel: one single, one double, and one for four persons. How many ways are there to house seven persons in these rooms?
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5
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Find the probability that a leap year selected at random will contain 53 Sundays
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It is required to seat 5 boys and 4 girls in a row so that the girls occupy the even places. How many such arrangements are possible?
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How many 3digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated
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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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A polygon has 44 diagonals. What is the number of its sides?
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10
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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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