A and B weave a carpet in 10 days and 15 days, respectively. They begin to work together but B leaves after 2 days. In what time will A complete the remaining work ?

 [ A ]    6$1 \over 3$ days [ B ]    6$2 \over 3$ days [ C ]    7 days [ D ]    8 days [ E ]    None of these
 Answer : Option B Explanation :