A garrison of 400 men had a provision for 31 days. After 28 days 300 persons re-enforcement leave the garrison. Find the number of days for which the remaining ration will be sufficient? Choose the most appropriate option:
A) 65 days
B) 45 days
C) 10 days
D) 16 days
E) 12 days
400 --- 31   400 --- 3   100 --- ?   400*3 = 100*x =&gt; x =12 days.   Answer: 12 days
<result>E</result>
A garrison of 400 men had a provision for 31 days. After 28 days 300 persons re-enforcement leave the garrison. Find the number of days for which the remaining ration will be sufficient?