A Reuter's article on March 14, 2012 reported that Somali pirates had decided to cut their ransom demands so as to avoid costly hostage maintenance and increase flow rate. The article says that on average the pirates were holding 30 ships hostage, and each ship was held for 150 days. How many ships on average are the pirates capturing each month? (Assume a month is 30 days) 6 ships per month 1/5 ships per month 30 ships per month 10 ships per month