How many 5 digit even numbers with distinct digits can be formed using the digits 1, 2, 5, 5, 4?
16
24
36
48
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1
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In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?
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2
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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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3
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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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4
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In how many ways can 10 people line up at a ticket window of a railway station?
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5
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The students in a class are seated, according to their marks in the previous examination. Once, it so happens that four of the students got equal marks and therefore the same rank. To decide their seating arrangement, the teacher wants to write down all possible arrangements one in each of separate bits of paper in order to choose one of these by lots. How many bits of paper are required?
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6
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Three unbiased coins are tossed. What is the probability of getting at most two heads ?
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7
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If (n + 2)! = 2550 (n!); find ’n’
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8
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How many rectangles can be formed out of a chess board ?
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9
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A basketball team of 5 players is to be selected from a group of 10 men and 8 women players. A volley ball team of 6 players is to be selected from a group of 8 men and 7 women players. Find the difference in the number of ways in which both the teams are selected, given that each team has only 2 female players.
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10
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How many parallelograms will be formed if 7 parallel horizontal lines intersect 6 parallel vertical lines?
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