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
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, 6, 7, 8, 9, 10}= 10 The event the chosen number... View Article
A Couple Has Three Children The Probability Of Having 2 Sons And A Daughter If The Eldest Child Is A Son Is 1) 2/3 2) 1/2 3) 3/4 4) None of these Solution: Option (1) 2/3 Total number of children = 3 Let “S” represent the son and “D”... View Article
The Probability Of Getting Head And Tail Alternatively In Three Throws Of A Coin Or Throw Of Three Coins Is 1) 1/8 2) 1/4 3) 1/3 4) 3/8 Solution: Option (2) 1/4 If three coins are thrown, the total number of sample space = 8 S =... 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
For The Two Events A And B Pa Equals 038 Pb Equals 041 Then The Value Of Pa Not Is 1) 0.41 2) 0.62 3) 0.59 4) 0.21 Solution: Option (2) 0.62 Given that, P(A) = 0.38, P(B) = 0.41 P(not A) = P(A’) = 1- P(A) = 1-... View Article
Three Identical Dice Are Rolled The Probability That Same Number Will Appear On Each Of Them Will Be 1) 1/6 2) 1/36 3) 1/18 4) 2/38 Solution: option (2) 1/36 If three dice are rolled, the total number of sample space = 216 The event... View Article
Five Horses Are In A Race Mr A Selected Two Of The Horses At Random And Bets On Them The Probability That Mr A Selected The Winning Horse Is 1) 4/5 2) 3/5 3) 1/5 4) 2/5 Solution: Option (4) 2/5 Total number of horses = 5 The probability that Mr. A selected the losing... View Article
The Chance Of Throwing At Least 9 In A Single Throw With Two Dice Is 1) 1/18 2) 5/18 3) 7/18 4) 11/18 Solution: Option (2) 5/18 If two dice are thrown, the total number of sample space = 36 The... View Article
The Probability That An Event Will Fail To Happen Is 005 The Probability That The Event Will Take Place On 4 Consecutive Occasions Is 1) 0.00000625 2) 0.18543125 3) 0.00001875 4) 0.81450625 Solution: Option (4) 0.81450625 Given that, P(A’) = 0.05 Hence, P(A) =... View Article
Two Dice Are Thrown The Probability That The Sum Of The Points On Two Dice Will Be 7 Is 1) 5/36 2) 6/36 3) 7/36 4) 8/36 Solution: 6/36 If two dice are thrown the total number of sample space = 36 n(S) = 36 Let A be be... View Article
Two Dice Are Tossed The Probability That The Total Score Is A Prime Number Is 1) 1/6 2) 5/12 3) 1/2 4) None of these Solution: option (2) 5/12 If two dice are rolled, the total number of sample space = 36 n(S)... View Article
The Probability Of Happening Of An Impossible Event Ie P Of Null Is 1) 1 2) 0 3) 2 4) –1 Solution: Option (2) 0 An impossible event is an event that will not happen. Hence, the probability of an... View Article
A Box Contains 10 Good Articles And 6 With Defects One Article Is Chosen At Random What Is The Probability That Its Is Either Good Or Has 1) 24/64 2) 40/64 3) 49/64 4) 64/64 Solution: Option (4) 64/64 Total of articles in a box = 10 +6 = 16 articles The probability of... View Article
Three Dice Are Thrown Simultaneously What Is The Probability Of Containing A Total Of 17 Or 18 1) 1/9 2) 1/72 3) 1/54 4) None of these Solution: option (3) 1/54 If three dice are thrown simultaneously, the total number of... View Article
A Cricket Team Plays M Number Of Matches In Winter And Wins X Matches Further It Plays N Number Of Matches In Summer And Wins Y Matches 1) (x/m).(y/n) 2) (x/m)-(y/n) 3) (x+y)/(m+n) 4) None of these Solution: Option (3) (x+y)/(m+n) Total number of matches in both... View Article
A Card Is Drawn From A Pack Of Cards What Is The Probability That The Drawn Card Is Neither A Heart Not A King 1) 4/13 2) 9/13 3) 1/4 4) 13/26 Solution: Option (2) 9/13 Total number of cards in a pack = 52 Let H be the event of selecting a... View Article
A Bag Contains 4 White 5 Black And 6 Red Balls If A Ball Is Drawn At Random Then What Is The Probability That The Drawn Ball Is Either White Or Red 1) 4/15 2) 1/2 3) 2/5 4) 2/3 Solution: Option (4) 2/3 Total number of balls = 4+5+6 = 15 Probability of getting white balls = 4/15... View Article
Three Fair Coins Are Tossed If Both Heads And Tails Appears Then The Probability That Exactly One Head Appears Is 1) 3/8 2) 1/6 3) 1/2 4) 1/3 Solution: Option (3) ½ If three coins are tossed, the sample space, S obtained is 8 The number of... View Article
A Man And Woman Appear In An Interview For Two Vacancies In The Same Post The Probability Of Mans Selection Is 14 And That Of The Womans 1) 1/2 2) 1/12 3) 1/4 4) None of these Solution: Option (1) ½ Let “M” be the event that the man will be selected and “W” be the... View Article