SOLUTION: 80 percent of the workers,working in a comping wear jeans. of these 20 percent wear jeans that are black,what percent of yhe workers wear jeans that are not black?

Question 1143467: 80 percent of the workers,working in a comping wear jeans.
of these 20 percent wear jeans that are black,what percent of yhe workers
wear jeans that are not black?
Answer by ikleyn(52919) (Show Source): You can put this solution on YOUR website!
.

Let N be the number of ALL workers.


The number of those who wear jeans is 0.8N, according to the condition.


The number of those who wear black jeans is  0.2*(0.8*N) = (0.2*0.8)*N = 0.16*N


The number of those who wear jeans that are nor black is  0.8*N - 0.16*N = 0.64*N.


The answer to the problem question is   = 80%.    ANSWER

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I gave you very detailed solution / explanation,

but reading the problem attentively (and having some experience in solving such problem),
one can get the answer mentally and very quickly without any calculations.

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