Question 345447
In a company printing work is done by two machine 5% of the work done by machine A are wasted ,
 and 40% of work done by machine B are wasted.
 if the 80% of the total work is done by machine A. then what is the total percentage of wastage.
:
Let 1 = total amt done by both machines
Machine A does 80%
Machine B does 20%
:
Using decimals
Machine A wastes .05(.8) = .04 of total wasted
Machine B wastes .40(.2) = .08 of total wasted
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total from both machines: .12 * 100 = 12% wasted