In an examinations there are three multi...

In an examinations there are three multiple choice questions and each questions has 4 choices. Find the number of ways in which a student can fail to get all answer correct.

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ARIHANT MATHS ENGLISH-PERMUTATIONS AND COMBINATIONS -Exercise For Session 4

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If ^18C15+2 ^18C16+^17C16+1=^nC3, then n=
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If .^(20)C(n+1) = ^ (n) C(16), then the value of n is a.7 b. 10 c....
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The value of expression ^47 C4+sum(j=1)^5^(52+j)C3 is equal to a.^47 C...
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If ""^(n)C(3) + ""^(n)C4 gt ""^(n+1) C3 , then.
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The solution set "^10C(x-1)>2."^10Cx is
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if .^(2n)C(2):^(n)C(2)=9:2 and .^(n)C(r)=10, then r is equal to
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If .^(2n)C(3):^(n)C(2)=44:3, for which of the following value of r, th...
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If ^n Pr=^n P(r+1)a n d^n Cr=^n C(r-1,) then the value of n+r is.
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If .^nPr=840, .^nCr=35, then find n=
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