A broker charged an average commission of 12 percent on two transactions: one for $600 and the other for $900. If his commission for the $900 transaction was 10 percent, what percent was his commission for the $600 transaction?

Question

A) 1%

B) 12%

C) 13%

D) 14%

E) 15%

total amount is 600 + 900 =1500.
12% of 1500 = 180

10% 0f 900 is 90. so commission on 600 was 90

so 90/600 is 15%

so answer should be 15%.

Answer 1

Avg. = (10+x)/2 = 12. 10 + x = 24, X = 14%.