In a single throw with four dice,the probability of throwing seven is
20/6^{4}
24/6^{5}
22/8^{4}
24/8^{4}
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1
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In how many ways can the letters of the word 'LEADER' be arranged?
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2
Discuss

Find the number of ways in which mixed double tennis game can be arranged amongst 9 married couples if no husband and wife play in the same game
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3
Discuss

A committee of 8 members is to be selected from a group of 12 male and 10 female members. In how many ways the committee is selected such that at most two and at least one male member are there in the committee?
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4
Discuss

Seven different objects must be divided among three people. In how many ways can this be done if one or two of them must get no objects?
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5
Discuss

How many words can be formed from the letters of the word "SIGNATURE" so that vowels always come together.
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6
Discuss

The number of triangles that can be formed by choosing the vertices from a set of 12 points, seven of which lie on the same straight line, is
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7
Discuss

If ^{18}C_{r }= ^{18}C_{r+2 }; find ^{r}C_{5}.
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8
Discuss

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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9
Discuss

If A and B are two independent events with P(A) = 3/5 and P(B) = 4/9 , then P(A' ∩ B' ) equals
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10
Discuss

In a simultaneous throw of two dice, what is the probability of getting a total of 7?
Solution 
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