Arabica coffee costs $0.5 per ounce while Robusta coffee costs $0.3 per ounce. If the blend of Arabica and Robusta costs $0.33 per ounce, what is the share of Arabica in this blend?
Choose the correct choice from the following answers
A) 15%  B) 24%  C) 30%  D) 33%  E) 40%
a= amount of arabica coffee   1-a = amount of robusta coffee. because if you subtract a from the 1 ounce, the remaining amount is robusta   therefore:   .5a + .3(1-a) = .33   .5a + .3 - .3a = .33   a= .3/2   therefore: .3/2/1 ounce = 15%. Therefore, the answer should be 15%
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Arabica coffee costs $0.5 per ounce while Robusta coffee costs $0.3 per ounce. If the blend of Arabica and Robusta costs $0.33 per ounce, what is the share of Arabica in this blend?