How many rectangles can be formed out of a chess board ?
1740
1230
1296
204
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1
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How many words, with or without meaning, can be formed using all letters of the word EQUATION using each letter exactly once?
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2
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If ,, are probabilities of three mutually exclusive events, then
SolutionAnswer :1/2 |
3
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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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4
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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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5
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If four dice are thrown together, then what is the probability that the sum of the numbers appearing on them is 25 ?
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6
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If A, B and C are mutually exclusive and exhaustive events of a random experiment such that P(B)=3/2P(A) and P(C)=1/2P(B), then P(A∪C)=
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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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In a single throw with four dice,the probability of throwing seven is
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9
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If (n + 2)! = 2550 (n!); find ’n’
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10
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How many words can be formed from the letters of the word "SIGNATURE" so that vowels always come together.
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