A collection of 16 coins, each with a face value of either 10 cents or 25 cents, has a total face value of $2.35. How many of the coins have a face value of 10 cents? Choose the most appropriate option.
A) 2
B) 5
C) 8
D) 9
E) 11
0.10(x)+0.25(16-x)=2.35   0.10x+4-0.25x=2.35   so x=11   ans is 11
<result>E</result>
A collection of 16 coins, each with a face value of either 10 cents or 25 cents, has a total face value of $2.35. How many of the coins have a face value of 10 cents?