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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},"ZAM9IaXZPLdd86FVmi4c45RUO9g6SP","q","The variance of x, 2x, 3x, 4x and 5x is","ans",[414],1,"2000","course","mathematics","exp","Hint: prepare a three-columned table, one for (x), another for the (deviation), and the last for the (squared-deviation).
\n
\nSum of (x) = 15x, algebraic sum of (deviation) = zero (0)
\nSum of (squared-deviation) = 10x²
\n
\nVariance = ∑(squared-deviation)/n = 10x²/5 = 2x²","opts",[422,423,424,425],"x√2","2x²","x²","3x",34,"34","initComment","initReply","actionData","errors"]

JAMB - Mathematics (2000 - No. 34)

Explanation

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