If ,
,
are probabilities of three mutually exclusive events, then
None Of These
Answer :1/2
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1
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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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2
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Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?
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3
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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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4
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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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5
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A, B, C, D and E sit on five chairs all of which are facing north. C will sit only on the leftmost chair and B will not sit anywhere to the left of A. In how many ways they can be seated?
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6
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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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7
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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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8
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A number lock on a suitcase has 3 wheels each labeled with 10 digits from 0 to 9. If the opening of the lock is a particular sequence of three digits with no repeats, how many such sequences will be possible?
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9
Discuss
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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 |
10
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In how many different ways can the letters of the word 'DETAIL' be arranged in such a way that the vowels occupy only the odd positions?
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