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(52915) (Show Source):
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
---------------
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.
