Dan bought x pencils, some at 10 cents each and the rest at 6 cents each. For the same
amount of money that he spent on these pencils, he could have bought x pencils at 9 cents
each. What is the ratio of the number of 10-cent pencils purchased to the number of 6-cent
pencils purchased?
(A) 1 : 1
(B) 2 : 1
(C) 3 : 1
(D) 4 : 1
(E) 5 : 1
amount of money that he spent on these pencils, he could have bought x pencils at 9 cents
each. What is the ratio of the number of 10-cent pencils purchased to the number of 6-cent
pencils purchased?
(A) 1 : 1
(B) 2 : 1
(C) 3 : 1
(D) 4 : 1
(E) 5 : 1