9 men and 12 boys finish a job in 12 days, 12 men and 12 boys finish it in 10 days. 10 men and 10 boys shall finish it in how many days?
Choose the correct choice from the following answers
A) 11 days	B) 12 days	C) 17 days	D) 16 days	E) 18 days
12 days   12 days   9M + 1212 days ----- 12 days   12M + 1212 days ------- 10 days   10M + 1012 days -------?   108M + 14412 days = 120M +12012 days   2412 days = 12M =&gt; 1M = 212 days   1812 days + 1212 days = 3012 days ---- 12 days   2012 days + 1012 days = 3012 days -----? =&gt; 12 days
<result>B</result>
9 men and 12 boys finish a job in 12 days, 12 men and 12 boys finish it in 10 days. 10 men and 10 boys shall finish it in how many days?