A coin is tossed 5 times. What is the probability that head appears an odd number of times?
1/2
2/3
1/3
1
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1
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From a pack of 52 playing cards, two cards are drawn together at random. Calculate the probability of both the cards being the Kings.
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2
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How many 3-digit 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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3
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There are 20 people among whom two are sisters. Find the number of ways in which we can arrange them around a circle so that there is exactly one person between the two sisters.
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4
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Three unbiased coins are tossed. What is the probability of getting at most two heads ?
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5
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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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6
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How many rectangles can be formed out of a chess board ?
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7
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The number of circles that can be drawn out of 10 points of which 7 are collinear is
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8
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A teacher has to choose the maximum different groups of three students from a total of six students. Of these groups, in how many groups there will be included in a particular student?
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9
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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?
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10
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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?
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