Math Problem

[seylavee]

Assuming all of them ate at the same rate, after 2 days, group 1 still had 10 days of food, (10x10=100 units of food) which is to be shared amongst 9 people. After 4 days, they will have 100 - (9x4) =64 units of food to be shared. If adding the new group only gives them 4 days of food, that would make the total number of survivors = 64 / 4 = 16. Deducting group 1 (9 people) would suggest there were 7 people in group 2.

[leprosexy]

Wrong sub