Arabica coffee costs $0.3 per ounce while Robusta coffee costs $0.2 per ounce. If the blend of Arabica and Robusta costs $0.22per ounce, what is the share of Arabica in this blend?	Choose the correct choice from the following options
A) 20%  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:   .3a + .2(1-a) = .22   .3a + .2 - .2a = .22   a= .2   therefore: .2/1 ounce = 20%. Therefore, the answer should be 20%
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Arabica coffee costs $0.3 per ounce while Robusta coffee costs $0.2 per ounce. If the blend of Arabica and Robusta costs $0.22per ounce, what is the share of Arabica in this blend?