How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
16
24
36
48
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1
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How many numbers can be formed from 1, 2, 3, 4, 5 (without repetition), when the digit at the unit’s place must be greater than that in the ten’s place?
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2
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In a group of 6 boys and 4 girls, four children are to be selected. In how many different ways can they be selected such that at least one boy should be there?
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3
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If
SolutionAnswer :1/2 |
4
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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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5
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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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6
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In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?
Solution |
7
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Three unbiased coins are tossed. What is the probability of getting at most two heads ?
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8
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In how many different ways can the letters of the word 'CORPORATION' be arranged so that the vowels always come together?
Solution |
9
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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?
Solution |
10
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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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