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
3500
1875
1750
3000
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1
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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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2
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Three unbiased coins are tossed. What is the probability of getting at most two heads ?
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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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A basketball team of 5 players is to be selected from a group of 10 men and 8 women players. A volley ball team of 6 players is to be selected from a group of 8 men and 7 women players. Find the difference in the number of ways in which both the teams are selected, given that each team has only 2 female players.
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5
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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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6
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In how many ways can 10 people line up at a ticket window of a railway station?
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7
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If ^{18}C_{r }= ^{18}C_{r+2 }; find ^{r}C_{5}.
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8
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In a single throw with four dice,the probability of throwing seven is
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9
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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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10
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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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