The number of circles that can be drawn out of 10 points of which 7 are collinear is
130
85
45
72
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#  Quiz 

1
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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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2
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A number lock on a suitcase has 3 wheels each labeled with 10 digits from 0 to 9. If the opening of the lock is a particular sequence of three digits with no repeats, how many such sequences will be possible?
Solution 
3
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In a single throw with four dice,the probability of throwing seven is
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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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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?
Solution 
6
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A, B, C, D and E sit on five chairs all of which are facing north. C will sit only on the leftmost chair and B will not sit anywhere to the left of A. In how many ways they can be seated?
Solution 
7
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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?
Solution 
8
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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.
Solution 
9
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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?
Solution 
10
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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?
Solution 
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