Arabica coffee costs $0.4 per ounce while Robusta coffee costs $0.3 per ounce. If the blend of Arabica and Robusta costs $0.37 per ounce, what is the share of Arabica in this blend?  Choose the correct choice from the following answers.
A) 20%	B) 24%	C) 70%	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:   .4a + .3(1-a) = .37   .4a + .3 - .3a = .37   a= .7   therefore: .7/1 ounce = 70%. Therefore, the answer should be 70%
<result>C</result>
Arabica coffee costs $0.4 per ounce while Robusta coffee costs $0.3 per ounce. If the blend of Arabica and Robusta costs $0.37 per ounce, what is the share of Arabica in this blend?