If Ncr Denotes The Number Of Combinations Of N Things Taken R At A Time Then Expression Ncr1 Ncr1 2 X Ncr Equals
1) n+2Cr 2) n+2Cr+1 3) n+1Cr 4) n+1Cr+1 Answer: (2) n+2Cr+1 Solution: nCr+1 + nCr-1 + 2 x nCr =... View Article
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Assuming The Balls To Be Identical Except For Difference In Colours The Number Of Ways In Which One Or More
1) 880 2) 629 3) 630 4) 879 Answer: (4) 879 Solution: Number of ways of choosing one or more... View Article
A Student Is Allowed To Select At Most N Books From A Collection Of 2n 1 Books If The Total Number Of Ways
1) 2 2) 3 3) 4 4) None of these Answer: (2) 3 Solution: As per the given condition, 2n+1C1... View Article
In How Many Ways A Team Of 11 Players Can Be Formed Out Of 25 Players If 6 Out Of Them Included
1) 2020 2) 2002 3) 2008 4) 8002 Answer: (2) 2002 Solution: There are total 25 players. Out of them... View Article
Ncr N1cr Rcr
1) n+1Cr 2) n+1Cr+1 3) n+2Cr 4) 2n Answer: (2) n+1Cr+1 Solution: nCr+n-1Cr+…+rCr = nCr+n−1Cr+n−2Cr+…..+r+1Cr+rCr = nCr+n−1Cr+n−2Cr+……+r+2Cr+(r+1Cr+r+1Cr+1) = nCr+n−1Cr+n−2Cr+…..+r+2Cr+r+2Cr+1 =... View Article
How Many Ways Can 21 English And 19 Hindi Books Be Placed In A Row So That No Two Hindi Books Are Together
1) 1540 2) 1450 3) 1504 4) 1405 Answer: (1) 1540 Solution: To place 21 English books in we have... View Article
In An Election Number Of Candidates Is 1 Greater Than Persons Elected If A Voter Can Vote In 254 Ways
1) 7 2) 10 3) 8 4) 6 Answer: (3) 8 Solution: If we have n number of candidates, then,... View Article
How Many Ways Can 5 Red And 4 White Balls Be Drawn From A Bag Containing 10 Red And 8 White Balls
1) 8C5x10C4 2) 10C5x8C4 3) 18C9 4) None of these Answer: (2) 10C5x8C4 Solution: We have 10 red balls and... View Article
A Person Is Permitted To Select At Least One And At Most N Coins From A Collection Of 2n 1 Distinct Coins
1) 4 2) 8 3) 16 4) 32 Answer: (1) 4 Solution: 2n+1C1 + 2n+1C2+..+2n+1Cn=255 ….(i) Sum of binomial coefficients... View Article
There Are 15 Persons In A Party And Each Person Shake Hand With Another Then Total Number Of Handshakes Is
1) 15P2 2) 15C2 3) 15! 4) 2(15!) Answer: (2) 15C2 Solution: Handshake happens between two people. Therefore number of... View Article
The Least Value Of Natural Number N Satisfying C N5 Cn6 Cn 15 Is
1) 11 2) 10 3) 12 4) 13 Answer: (1) 11 Solution: C(n,5) + C(n,6) > C(n + 1,5) nC5... View Article
Out Of 5 Apples 10 Mangoes And 15 Oranges Any 15 Fruits Are To Be Distributed Among Two Persons
1) 66 2) 36 3) 60 4) None of these Answer: (1) 66 Solution: Give, there 5 apples, 10 mangoes... View Article
10 Different Letters Of English Alphabet Are Given Out Of These Letters Words Of 5 Letters Are Formed
1) 69760 2) 98748 3) 96747 4) 97147 Answer: (1) 69760 Solution: When all five letters are repeated, then number... View Article
A Question Paper Consists Of Three Sections A B C Having 643 Questions Respectively
1) 5000 2) 8000 3) 6615 4) 9600 Answer: (3) 6615 Solution: Required number of ways = (26-1) (24-1)(23-1) =... View Article
What Is Heavy Water Made Of
Heavy water is composed of oxygen and deuterium, a heavier isotope of hydrogen. Know about heavy water and its properties... View Article
What Is Hard Water Examples
Examples of hardwater are: Groundwater like deep wells Tap water Know about difference between hard water and soft water in... View Article
What Is Corrosion Give Two Example
Corrosion is defined as the degradation of metals due to an electrochemical process. In this process metals are converted into... View Article
Does Isopropyl Alcohol Give A Positive Iodoform Test
Yes, isopropyl alcohol gives a positive iodoform test. Know about physical and chemical properties of alcohols in detail, @BYJU’S!
Which Of The Following Does Not Hydrolyse In Water
PCI3 NF3 NaCl3 BF3 Answer: 2. NF3 does not undergo hydrolysis since it does not have any vacant orbitals to... View Article
Is 4 A Complex Number
No, 4 is not a complex number. To know in detail about various concepts, visit BYJU’S – The Learning App!
