In a group of hats consisting of only blue hats, green hats, and purple hats, the ratio of blue hats to green hats to purple hats is 7:4:12. If there are a total of 115 hats in this group, how many of these hats are not blue?
Pick one.
A) 28 B) 42 C) 48 D) 64 E) 80
B:G:P = 7:4:12 --&gt; total of 23 parts.   Not blue = (G + P)/(total)*92 = 16/23*115= 
<gadget id="calculator">16/23*115</gadget>
<output>80</output>
80.   Answer: 80.
<result>E</result>
In a group of hats consisting of only blue hats, green hats, and purple hats, the ratio of blue hats to green hats to purple hats is 7:4:12. If there are a total of 115 hats in this group, how many of these hats are not blue?