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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 = 9 x 10 x 10 x 10 - 9 x 9 x 8 x 7 =... 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 cages which cannot enter in 4... 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]... View Article

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 to 1000 = (Number of times 3 occurs exactly... 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 15C1 ways = 152 Second couple can be... 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 boys, where each can get any... 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 not have any girl neighbour and girl Y does not... 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)!... 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... 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 of numbers is equal to the ratio of sum of... 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 be 7 digits We have 2,3,0,3,4,2,3... 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 3! Solution: 3 out of 10 persons wish to sit as a group. The number of... 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 we have 7 digits here Therefore,... 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 = {a,b,c,d,...,n} For one element, there are n... 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 1 = 8 The probability of getting... 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 a target, P(A)... View Article

The Probability That A Speaks Truth Is 45 While This Probability For B Is 34 The Probability That They Contradict Each Other When Asked To Speak

1) 4/5 2) 1/5 3) 7/20 4) 3/20 Solution: Option (3) 7/20 The probability that A speaks truth, P(A) = 4/5 Hence, the probability that... View Article