Kim bought a total of $2.65 worth of postage stamps in four denominations. If she bought an equal number of 5-cent and 25-cent stamps and twice as many 10-cent stamps as 5-cent stamps, what is the least number of 6-cent stamps she could have bought ? Choose the correct choice:
A) 5
B) 10
C) 15
D) 20
E) 2.5
2.65 = 0.05x + 0.25x + 2 * 0.10x + 0.06y   =&gt; 2.65 = 0.30x + 0.20x + 0.06y   =&gt; 265 = 50x + 6y   So Max value of 50x &lt; 265 = 250   Hence y = 2.5   Answer - 2.5
<result>E</result>
Kim bought a total of $2.65 worth of postage stamps in four denominations. If she bought an equal number of 5-cent and 25-cent stamps and twice as many 10-cent stamps as 5-cent stamps, what is the least number of 6-cent stamps she could have bought ?