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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"9TyNLVldqXCJt5Jd2N1y7naZQGJga6","q","A bag contains 5 black, 4 white and x red marbles. If the probability of picking a red marble is 2/5, find the value of x","ans",[414],3,"2006","course","mathematics","exp","Black = 5
\nWhite = 4
\nRed = x
\nTotal = 9+x
\nP(red) = 2/5
\nx / (9+x) = 2/5
\n5x = 2(9+x)
\n5x = 18+2x
\n5x-2 = 18
\n3x = 18
\nx = 6","opts",[422,423,424,425],"8","10","4","6",4,"initComment","initReply","actionData","errors"]

JAMB - Mathematics (2006 - No. 4)

Explanation

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