There are 6 letters for 3 envelopes. In how many different ways can the envelopes be filled?
120
130
100
110
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1
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One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is not a face card (Jack, Queen and King only)?
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2
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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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3
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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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4
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If A and B are two independent events with P(A) = 3/5 and P(B) = 4/9 , then P(A' ∩ B' ) equals
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5
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Two cards are drawn together from a pack of 52 cards. The probability that one is a spade and one is a heart, is
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6
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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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7
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A biased coin in tossed thrice. What is the probability that heads turns out at least twice considering that the probability of a head is 60%?
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8
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A teacher has to choose the maximum different groups of three students from a total of six students. Of these groups, in how many groups there will be included in a particular student?
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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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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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