There are 6 letters for 3 envelopes. In how many different ways can the envelopes be filled?
120
130
100
110
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#  Quiz 

1
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A coin is tossed 5 times. What is the probability that head appears an odd number of times?
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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 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
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5
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Six boys and 4 girls are to be seated in two separate rows with five chairs each, such that two particular girls are always together and all the girls are not in the same row. In how many ways can they be seated?
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6
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Find the probability that a leap year selected at random will contain 53 Sundays
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7
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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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8
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A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw?
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9
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How many numbers can be formed from 1, 2, 3, 4, 5 (without repetition), when the digit at the unit’s place must be greater than that in the ten’s place?
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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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