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If 10. ""^(n)C(2)=3. ""^(n+1)C(3) find n...

If `10. ""^(n)C_(2)=3. ""^(n+1)C_(3)` find n.

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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-EXERCISE -1.5 VERY SHORT ANSWER QUESTIONS
  1. If ""^(n)C(4)=210 then find n.

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  2. If ""^(13)C(r)=715, then find possible values of r.

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  3. If 10. ""^(n)C(2)=3. ""^(n+1)C(3) find n.

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  4. If ""^(n)C(4)=""^(n)C(6), find n.

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  5. If ""^(12)C(r+1)=""^(12)C(3r-5), find r.

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  6. If ""^(n)C(21)=""^(n)C(28), then find ""^(50)C(n)

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  7. If ""^(9)C(3)+""^(9)C(5)=""^(10)C(r) then find r.

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  8. Find the value of ""^(10)C(5)+2. ""^(10)C(4)+""^(10)C(3).

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  9. Simplify ""^(34)C(5)+ overset(4) underset(r=0)Sigma ""^((38-r))C(4).

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  10. If ""^(n)P(r)=5040 and ""^(n)C(r)=210, find n and r.

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  11. Find the number of ways of selecting 7 members from a contingent of 10...

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  12. Find the number of ways of selecting 3 girls and 3 boys out of 7 girls...

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  13. Find the number of ways of selecting 3 vowels and 2 consonants from th...

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  14. Find the number of ways of selecting 4 English, 3 Telugu and 2 Hindi b...

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  15. Find the number of ways of selecting a committee of 6 members out of 1...

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  16. Find the number of ways of selecting 5 books from 9 different mathemat...

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  17. The number of five letter words can be formed using 3 consonent...

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  18. 10 persons are sitting in a row. Find the number of ways of selecting ...

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  19. 10 persons are sitting around a circle. In how many ways can 2 persons...

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  20. If a set of 'm' parallel lines intersect another set of 'n' parallel l...

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