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A student is to answer 10 out of 13 ques...

A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him is :

A

196

B

280

C

346

D

140

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MODERN PUBLICATION-BINOMIAL THEOREM-EXERCISE
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  3. A student is to answer 10 out of 13 questions in an examination such t...

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  5. The number of integral terms in the expansion of (sqrt3 + root(8)(5))^...

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  6. The coefficient of t^24 in (1+t^2)^2 (1+ t^12) (1+ t^24) is:

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  7. How many ways are there to arrange the letters in me word ‘GARDEN’ wit...

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  8. If ^n-1Cr=(k^2-3)^n C(r+1),then k in

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  9. The coefficient of the middle term in the binomial expansion in powers...

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  10. Thr ciefficient of x^(n-2) in the polynomial (x-1)(x-2)(x-3)"…."(x-n),...

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  11. If the letters of the word SACHIN are arranged in all possible ways ...

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  12. A rectangle with sides (2m-1) and (2n -1) is divided into squares of u...

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  13. The value of ""^50C4+ underset (r=1) overset (6) sum ""^(56-r)C3 is :

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  14. If the coefficient of x^(7) " in " (ax^(2) + (1)/(bx))^(11) is equal ...

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  15. The value of {:((30), (0))((30), (10))-((30), (1))((30),( 11)) +((30),...

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  16. At an election, a voter may vote for any number of candidates not grea...

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  17. For natural numbers m ,n ,if(1-y)^m(1+y)^n=1+a1y+a2y^2+... , and a1=a2...

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  18. The letters of the word COCHIN are permuted and all the permutations a...

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  19. The sum of series .^(20)C0-^(20)C1+^(20)C2-^(20)C3+....+^(20)C 10 is

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  20. In the binomial expansion of (a -b)^n, nge5, the sum of the 5th and 6t...

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