If N2c8 N 2p4 57 16 Then N Is Equal To
If n+2C8 : n –2P4 = 57/16, then n is equal to: 1) 19 2) 2 3) 20 4) 5... View Article
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In A Cricket Championship There Are 36 Matches The Number Of Teams If Each Plays
In a cricket championship, there are 36 matches. The number of teams, if each plays 1 match with other are... View Article
From 6 Different Novels And 3 Different Dictionaries 4 Novels And 1 Dictionary Are To Be
From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in... View Article
If N 1c3 N 1c4 Nc3 Then N Is Just Greater Than
If n –1C3 + n –1C4 > nC3 , then n is just greater than: 1) 5 2) 6 3)... View Article
From 12 Books The Difference Between Number Of Ways A Selection Of 5 Books
From 12 books, the difference between number of ways a selection of 5 books when one specified book is always... View Article
There Are Two Urns Urn A Has 3 Distinct Red Balls And Urn B Has 9 Distinct Blue Balls
There are two urns. Urn A has 3 distinct red balls and urn B has 9 distinct blue balls. From... View Article
A Student Is Allowed To Select At Most N Books From A Collection Of 2 N 1books
A student is allowed to select at most n books from a collection of (2 n+ 1)books. If the total... View Article
A Teacher Takes 3 Children From Her Class To The Zoo At A Time As Often As She Can
A teacher takes 3 children from her class to the zoo at a time as often as she can, but... View Article
Statement I The Number Of Ways Distributing 10 Identical Balls In 4 Distinct Boxes
Statement I The number of ways distributing 10, identical balls in 4 distinct boxes such that no box is empty,... View Article
If X 11 2 3 4 5 Then The Number Of Different Ordered Pairs Y Z That Can Formed
If χ = {11, 2, 3, 4, 5}, then the number of different ordered pairs (Y, Z) that can formed... View Article
Let An Denote The Number Of All Ndigit Positive Integers Formed By The Digits 0 1
Let an, denote the number of all n-digit positive integers formed by the digits 0, 1 or both such that... View Article
Let An Denote The Number Of All N Digit Positive Integers Formed
Let an, denote the number of all n-digit positive integers formed by the digits 0, 1 or both such that... View Article
Total Number Of Ways In Which 5 Balls Of Different Colors Can Be Distributed Among 3 Persons
The total number of ways in which 5 balls of different colors can be distributed among 3 persons so that... View Article
A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if atleast one black ball is to be included in the draw? (1) 64 (2) 24 (3) 3 (4) 12
Answer: (1) 64 Given White balls = 2 Black balls = 3 Red balls = 4 Solution: Selection of 3... View Article
A Student Is To Answer 10 Out Of 13 Questions In An Examination He Must Choose At Least 4 From First Five Questions
A student is to answer 10 out of 13 questions in an examination such that he must choose at least... View Article
Let A And B Be Two Sets Containing 2 Elements And 4 Elements The Number Of Subsets
1) 256 2) 220 3) 219 4) 211 Answer: (3) 219 Solution: Total number of elements = 2 x 4... View Article
Determine N If 2nc2 Nc2 9 2
Determine n, If 2nC2 : nC2 : 9 : 2 1) 5 2) 4 3) 3 4) 2 Answer: (1)... View Article
Find Nc21 If Nc10 Nc11
Find nC21, If nC10 = nC11 1) 1 2) 0 3) 11 4) 10 Answer: (1) 1 Solution: Given, nC10... View Article
If N Is An Integer With 0 Less Than Or Equal N Less Than Or Equal 11 Then Minimum Value Of N 11 N Is Attained When A Value Of N
1) 11 2) 5 3) 7 4) 9 Answer: (2) 5 Solution: We can write, 11Cn = 11!/n!(11-n)! Now as... View Article
C1 C0 2c2 C1 3c3 C2 Ncn Cn 1 Is Equal To
\(\begin{array}{l}\frac{C_1}{C_0}+2\frac{C_2}{C_1}+3\frac{C_3}{C_2}+….+n\frac{C_n}{C_{n-1}}\end{array} \) is equal to (1) n(n-1)/2 (2) n(n+1)/2 (3) (n+1)(n+2)/2 (4) None of these Answer: (2) n(n+1)/2 Solution: \(\begin{array}{l}\frac{C_1}{C_0}+2\frac{C_2}{C_1}+3\frac{C_3}{C_2}+….+n\frac{C_n}{C_{n-1}}\end{array}... View Article
