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A student is allowed to select at most n books from a collection of (2n+1) books .If the total number of ways in which he can select books is 63 find the value of n.

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To solve the problem step by step, we will analyze the situation where a student can select at most \( n \) books from a collection of \( 2n + 1 \) books, and the total number of ways to select these books is given as 63. ### Step 1: Understand the total number of selections The total number of ways to select books from \( 2n + 1 \) books, selecting at most \( n \) books, can be expressed mathematically. The total number of ways to select \( k \) books from \( 2n + 1 \) books is given by the binomial coefficient \( \binom{2n+1}{k} \). ### Step 2: Write the expression for total selections The total number of ways to select at most \( n \) books is: \[ ...
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ALLEN-Solutions of Triangle & Binomial Theorem-Illustration
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  2. Prove that : ""^(25)C(10)+""^(24)C(10)+……..+""^(10)C(10)=""^(26)C(11)

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  3. A student is allowed to select at most n books from a collection of (...

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  4. Prove that (i) C(1)+2C(2)+3C(3)+……+nC(n)=n.2^(n-1) (ii) C(0)+(C(1)...

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  5. If (1+x)^n=underset(r=0)overset(n)C(r)x^r then prove that C(1)^2+2.C(2...

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  6. If (1 + x)^(n) = C(0) + C(1) x + C(2)x^(2) + C(3) x^(3)+ …+ C(n) x^(n...

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  7. Prove that (""^(2n)C(0))^2-(""^(2n)C(1))^2+(""^(2n)C(2))^2-.....+(-1)^...

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  8. Prove that : ""^(n)C(0).""^(2n)C(n)-""^(n)C(1).""^(2n-2)Cn(n)+""^(n)...

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  9. If (1+x)^n=C(0)C1c+C(2)x^2+…..+C(n)x^n then show that the sum of the p...

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  10. If (1+x)^n=C(0)+C(1)x+C(2)x^2+….+C(n)x^n then prove that (SigmaSigma)...

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  11. Find the coffiecient of x^2 y^3 z^4 w in the expansion of (x-y-z+w)^(...

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  12. Find the total number of terms in the expansion of 1(1+x+y)^(10) and c...

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  13. Find the coffiecient of x^5 in the expansion of (2-x+ 3x ^2)^6

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  14. If (1+x+x^2)^n = underset(2n)overset(r=0)Sigma a (r)x^r then prove th...

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  15. If f ( x ) = [ x ] , where [ ⋅ ] denotes greatest integral function...

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  16. Find the last three digits in 11^(50)

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  17. Prove that 2222^(5555)+5555^(2222) is divisible by 7

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  18. If x is so small such that its square and digher powers may be neglect...

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  19. The value of cube root of 1001 upto five decimal places is

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  20. If (1+x+x^2)^n = Sigma(2n)^(r=0) a (r)x^r then prove that (a) a(r...

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