20 women can do a work in 9 days. After they have worked for 6 days. 6 more men join them. How many days will they take to complete the remaining work?	Choose the most appropriate option.
A) 4:7	B) 4:3	C) 4:2	D) 4:0	E) 4:1
(20 * 16) women can complete the work in 1 day.   1 woman's 1 day work = 1/320   (16 * 15) men can complete the work in 1 day   1 man's 1 day work = 1/240   So, required ratio = 1/240 : 1/320 = 4:3.   Answer: 4:3
<result>B</result>
20 women can do a work in 9 days. After they have worked for 6 days. 6 more men join them. How many days will they take to complete the remaining work?