CAT Exam Numerical Ability Pipes and Cistern

In the expression xy2,the values of both variables x and y are decreased by 20%.By this,the value of the expresssion is decreased by

Read Solution (Total 1)

(x-20x/100)(y-20y/100)*2=(x-x/5)(y-y/5)*2=4x/5*4y/5*2=32xy/25
9 years agoHelpfull: Yes(1) No(1)

CAT Other Question

a shopkeeper received a pack of 15 pen out of which 4 were defective.the shopkeeper decided to examine every one one by one by selecting a pen at random .the pen examined are not put back.what is the probability that the ninth one examined is the last defective pen
options 11/195 b) 16/195 c)8/195 d)17/195 A dealer sells a set of furniture for Rs.900,which is 80% more than the price he paid for it.At what price he must sell the same set to make 120% profit on the cost price?