How many words, with or without meaning, can be formed using all letters of the word EQUATION using each letter exactly once?
38,320
39,320
38,400
40,320
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1
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A polygon has 44 diagonals. What is the number of its sides?
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2
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One red flower, three white flowers, and two blue flowers are arranged in a line such that
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3
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A fair coin is tossed 5 times. What is the probability of getting at least three heads on consecutive tosses?
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4
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How many rectangles can be formed out of a chess board ?
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5
Discuss

In how many ways can a cricketer can score 200 runs with fours and sixes only?
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6
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How many 3digit 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
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7
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What is the probability of getting at least one six in a single throw of three unbiased dice?s
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8
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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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9
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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 = 2^{3} = 8 i.e (T, H, TH, HT, HH, HHT, HTH, THH) Total event with 2H and 1 T is 3 therfore probability = 3/8 
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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