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RD SHARMA-COMBINATIONS-Solved Examples And Exercises
- If C(35, n+7)= C(35, 4n-2) then all the values of n are
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- Write the number of diagonals of an n-sided polygon.
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- Write the expression \ ^n C(r+1)+\ ^n C(r-1)+2xx\ ^n Cr in the simples...
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- There are 3 letters and 3 directed envelopes. Write the number of ways...
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- Write the maximum number of points of intersection of 8 straight lines...
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- The number of parallelograms that can be formed from a set of four par...
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- The number of ways in which 12 students can be equally divided into th...
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- Write the total number of words formed by 2 vowels and 3 consonants ...
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- If \ ^20 Cr=\ ^20 C(r-10) ,\ t h e n\ \ ^18 Cr is equal to a. 4896 b. ...
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- If \ ^(20)Cr=\ ^(20)C(r+4),\ t h e n\ \ ^r C3 is equal to a. 54 b. 56 ...
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- If \ ^(15)C(3r)=\ \ ^(15)C(r+3)\ then\ r is equal to a. 5 b. 4 c. 3 d....
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- If \ ^(20)C(r+1)=\ \ ^(20)C(r-1),\ t h e n\ r is equal to a. 10 b. 11 ...
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- If C(n , 12)=C(n ,8),\ t h e n\ C(22 , n) is equal to a. 231 b. 210 c....
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- If \ ^ C1=\ \ ^n 2 then 2m=n m=(n-1) d. 2n=m(m-1)
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- If \ ^n C(12)=\ \ ^n C8 then n = a. 20 b. 12 c. 6 d. 30
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- If \ ^n Cr+\ ^n C(r-1)=\ \ ^(n+1)Cx ,\ t h e n x = r b. r-1 c. n d. r...
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- If \ ^(a^2-a)C2=\ \ ^(a^2-a)C4\ t h e n= 2 b. 3 c. 4 d. none of ...
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- \ ^5C1+\ ^5C2+\ ^5C3+\ ^5C4+\ ^5C5 is equal to 30 b. 31 c. 32 d. 33
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- Total number of words formed by 2 vowels and 3 consonants taken from 4...
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- There are 12 points in a lane. The number of the straight lines joinin...
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