In how many ways can the letters of the word 'LEADER' be arranged?
360
720
120
None Of These
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1
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Four letters are selected from the word “CAPAME” and are rearranged to form four letter words. How many words can be formed?
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2
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In a single throw with four dice,the probability of throwing seven is
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3
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Find the probability that a leap year selected at random will contain 53 Sundays
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4
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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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5
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From among the 36 students in a class, one leader and one class representative are to be appointed. In how many ways can this be done?
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6
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If (n + 2)! = 2550 (n!); find ’n’
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7
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A person tosses an unbiased coin. When head turns up, he gets Rs.8 and tail turns up he loses Rs.4. If 3 coins are tossed, what is probability that he gets a profit of Rs.12?
SolutionPerson will get profit of Rs 12 only when there is 2H (Head) and 1T (Tail) H + H + T = 12 8 + 8 + (-4) = 12 Total outcome of 2 head and 1 tail = 23 = 8 i.e (T, H, TH, HT, HH, HHT, HTH, THH) Total event with 2H and 1 T is 3 therfore probability = 3/8 |
8
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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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9
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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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10
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What is the sum of all 4 digit numbers that can be formed by the digits 1, 2, 3, 4 each exactly once
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