10 binders can bind 1400 books in 21 days. How many binders will be required to bind 1800 books in 20 days?	Choose the correct answer
A) 87	B) 18	C) 17	D) 16	E) 12
Binders Books Days   10 1400 21   x 1600 20   x/10 = (1800/1400) * (21/20) =&gt; x = 12   Answer:12
<result>E</result>
10 binders can bind 1400 books in 21 days. How many binders will be required to bind 1800 books in 20 days?