The Product Of First N Odd Natural Numbers Equals To
1) 2nCn x nPn 2) (½)n.2nCn.nPn 3) (¼)n.2nCn x 2nPn 4) None of these Answer: (2) (½)n.2nCn.nPn Solution: Product of... View Article
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The Number Of The Factors Of 20 Is
1) 4140 2) 41040 3) 4204 4) 81650 Answer: (2) 41040 Solution: 20! = 218 x 38 x 54 x... View Article
Find The Number Of Chords That Can Be Drawn Through 16 Points On A Circle
1) 102 2) 120 3) 12 4) 16P2 Answer: (2) 120 Solution: Since all the points are on the circle,... View Article
The Number Of 4 Digits Numbers Which Do Not Contain 4 Different Digit Is
1) 2432 2) 3616 3) 4210 4) 4464 Answer: (4) 4464 Solution: Total Number of 4 digit numbers formed =... View Article
In A Circus There Are 10 Cages For Accommodating 10 Animals Out Of These 4 Cages Are So Small That Five Out Of Ten Animals
1) 66400 2) 86400 3) 96400 4) 46900 Answer: (2) 86400 Solution: Number of ways to accommodate 5 animals in... View Article
The Number Of Ways Of Distributing 52 Cards Among Four Players So That Three Players Have 17 Cards Each
1) 52!/3!.(17!)3 2) 52! 3) 52!/(17!) 4) 52!/(17!)2 Answer: (1) 52!/3!.(17!)3 Solution: 52C17x35C17x18C17x1C1x1/3! = 52!/[(3!)(17!)3]
The Number Of Times The Digits 3 Will Be Written When Listing The Integers From 1 To 1000 Is
1) 269 2) 300 3) 271 4) 302 Answer: (2) 300 Solution: Number of times digit 3 occurs from 1... View Article
The Number Of Ways Of Dividing 15 Men And 15 Women Into 15 Couples Each Consisting Of A Man And A Woman Is
1) 1240 2) 1840 3) 1820 4) 2005 Answer: (1) 1240 Solution: First couple can be selected in 15C1 x... View Article
4 Boys Picked Up 30 Mangoes In How Many Ways Can They Divide Them If All Mangoes Are Identical
1) 33C4 2) 33C2 3) 5456 4) 6554 Answer: (3) 5456 Solution: 30 mangoes are to be distributed among four... View Article
Three Boys And Three Girls Are To Be Seated Around A Round Table In A Circle Among Them The Boy X Does Not Want Any Girl Neighbour
1) 2 2) 4 3) 23 4) 33 Answer: (2) 4 Solution: As per the given condition, boy X does... View Article
A Library Has A Copies Of One Book B Copies Of Two Books C Copies Of Each Of Three Books And A Single Copy
Answer: (3) (a+2b+3c+d)!/[a!.(b!)2(c!)3] Solution: Total number of books = a+2b+3c+d Number of ways they can be arranged = (a+2b+3c+d)! If... View Article
In An Examination A Question Paper Consists Of 10 Questions Which Are Divided Into Two Parts Ie Part I And Part Ii
1) 5C2.7C2+5C1.5C3+5C0.7C3 2)12C5.12C7 3) 5C3.7C5 4) 12C8 Answer: (1) 5C2.7C2+5C1.5C3+5C0.7C3 Solution: As per the given condition, part i and part... View Article
Average Of Four Digits Numbers Formed By Using Each Of The Digits 357and 9 Exactly Once In Each Number Is
1) 4444 2) 5555 3) 6666 4) 7777 Answer: (3) 6666 Solution: As we know, the average of a list... View Article
How Many Numbers Greater Than 10 Lac Be Formed From 2303423
1) 420 2) 360 3) 400 4) 300 Answer: (2) 360 Solution: For numbers greater than 10 lacs there should... View Article
10 Persons Are To Be Arranged Around A Round Table 3 Persons Wish To Sit As A Group Number Of Ways The Arrangement Are
1) 9! x 3! 2) 8! x 3! 3) 7! x 8P3 4) 7! x 3! Answer: (4) 7! X... View Article
Number Of Numbers Formed Using All The Digits From 1234321 So That Odd Digits Occupy Odd Places Is
1) 12 2) 18 3) 24 4) 36 Answer: (2) 18 Solution: Given, there are 1,2,3,4,3,2,1 are the digits Total... View Article
Let A Be A Set With N Elements The Number Of Onto Functions From A To A Is
1) nn 2) nn-n! 3) nn/n! 4) n! Answer: (4) n! Solution: Set A has n number of elements A... View Article
A Bag Contains 3 Red And 5 Black Balls And A Second Bag Contains 6 Red And 4 Black Balls A Ball Is Drawn From Each Bag The Probability That
1) 3/20 2) 21/40 3) 3/8 4) None of these Solution: Option (2) 21/40 Total number of balls in bag... View Article
The Probability That A Marksman Will Hit A Target Is Given As 15 Then His Probability Of At Least One Hit In 10 Shoots Is
1) 1-(⅘)10 2) 1/510 3) 1-(1/510) 4) None of these Solution: Option (1) 1-(⅘)10 The probability that a marksman hit... View Article
A Number Is Chosen At Random From The First Ten Natural Numbers The Probability That Number Is Odd And Perfect Square Is
1) 2/9 2) 2/5 3) 3/7 4) 1/5 Solution: Option (4) 1/5 Total cases = {1, 2, 3, 4, 5,... View Article
