How many 3-digit 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
5
10
15
20
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1
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If
SolutionAnswer :1/2 |
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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A box contains two white balls, three black balls and four red balls. Balls of the same colour are distinct. The number of ways in which three balls can be drawn from the box if atleast one black ball is to be included in the draw, is
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4
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From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least three men are in the committee. In how many ways can it be done?
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5
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How many integers between 1000 and 10000 have no digits other than 4, 5, or 6?
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6
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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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7
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In how many ways can the letters of the word 'LEADER' be arranged?
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8
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A speaks truth in 75% cases and B in 80% of the cases. In what percentage of the cases are they likely to contradict each other, narrating the same incident?
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9
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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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10
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Find the probability that a leap year selected at random will contain 53 Sundays
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