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Find the number of ways of selecting 5 o...

Find the number of ways of selecting 5 objects from 9 dissimilar objects such that (i) a particular object is included (ii) a particular object is not included.

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The correct Answer is:
`""^(n-1)C_(r)` formula
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AAKASH SERIES-PERMUTATIONS & COMBINATIONS-ADDITIONAL SOLVED EXAMPLES
  1. Show that ""^(10)C(2)+""^(11)C(2)+""^(12)C(2)+""^(13)C(2)+......+""^...

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  2. Find the number of ways in which 3 numbers in A.P. can be selected fro...

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  3. Find the number of ways of selecting 5 objects from 9 dissimilar objec...

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  4. For a cricket trem people from one class and 8 people from ano...

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  5. How many 4 letter words can be formed using the letters of the word 'P...

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  6. Find the number of selections of 10 balls from unlimited number of red...

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  7. Find the number of selections of 10 balls from unlimited number of red...

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  8. There are 14 intermediate railway stations between Vijayawada and Hyde...

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  9. Out of 8 gentlemen and 5 ladies a committee of 5 is to be formed. Find...

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  10. There are 4 mangoes, 3 apples 2 oranges in bag, fruits of the same var...

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  11. There are 4 mangoes, 3 apples 2 oranges in bag, fruits of the same var...

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  12. There are 4 mangoes, 3 apples 2 oranges in bag, fruits of the same var...

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  13. Find the number of proper divisors of 2520. (i) How many of them are...

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  14. Find the number of proper divisors of 2520. How many of them are div...

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  15. How many selections of atleast one red ball can be made from 4 red bal...

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  16. Find the number of ordered pairs (x,y) such that L.C.M. of x and y is ...

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  17. Find the number of non negative integral solutions of x(1)+x(2)+x(3)+x...

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  18. Find the number of integral solutions of x(1)+x(2)+x(3)+x(4)=4 where e...

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  19. How many integral solutions are there to the systems of equations x(1)...

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  20. In how many ways can 5 post letters of which 3 are alike and two are d...

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