A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw?
32
48
64
96
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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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If 18Cr = 18Cr+2 ; find rC5.
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3
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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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4
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How many four-digit numbers, each divisible by 4 can be formed using the digits 5, 6, 7, 8, 9, repetition of digits being allowed in any number?
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5
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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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6
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If A, B and C are mutually exclusive and exhaustive events of a random experiment such that P(B)=3/2P(A) and P(C)=1/2P(B), then P(A∪C)=
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7
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Four letters are selected from the word “CAPAME” and are rearranged to form four letter words. How many words can be formed?
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8
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How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
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9
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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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10
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How many 4-letter words with or without meaning, can be formed out of the letters of the word, 'LOGARITHMS', if repetition of letters is not allowed?
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