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A lady gives a dinner party to 5 guests ...

A lady gives a dinner party to 5 guests to be selected from nine friends. The number of ways of forming the party of 5, given that two of the friends will not attend the party together, is

A

84

B

133

C

91

D

126

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-PERMUTATIONS AND COMBINATIONS -Assignment Section B Objective type questions (One option is correct )
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  2. There are four balls of different colours and four boxes of colours sa...

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  3. A lady gives a dinner party to 5 guests to be selected from nine frien...

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  4. At an election, a voter may vote for any number of candidates, not gre...

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  5. In a party of 30 people eah shakes hands with the others, Number of ha...

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  6. On the event of new year each student of class XI sends cards to his c...

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  7. A box contains 3 red, 4 white and 2 black balls. The number of ways in...

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  8. N a certain test, there are n question. In the test, 2^(n-i) students ...

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  9. Number of ways in which a composite number N can be resolved into two ...

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  10. The number of divisions of 9600 , including 1 and 9600 are

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  11. Find the sum of all five digit numbers ,that can be formed using the d...

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  12. The number of ways of selecting 8 books from a library which has 9 boo...

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  13. Let y be an element of the set A={1,2,3,4,5,6,10,15,30} and x(1), x(2)...

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  14. There are 12 points in a plane in which 6 are collinear. Number of dif...

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  15. Let Tn denote the number of triangles, which can be formed using th...

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  16. about to only mathematics

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  17. There are m points on the line AB and n points on the line AC, excludi...

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  18. The number of rectangle , of any sixe excluding squares from the recta...

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  19. The number of divisors of the form 4K + 2 , K ge 0 of the integers 24...

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  20. The exponent of 12 in 100! Is

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