# Chirs can make a chair in 12 days and Billy in 18 days they work together to make a chair for 6 days. What fraction of work is left? A. 1/2 B. 1/3 C. 1/3 D. 1/6

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in one day quiz can do 1 / 12 part of his work therefore in 6 days he will do[ 1 / 12 ] ×6 part of the work that is one by two part of the work similarly Billy can do 1 /18 part of work in 1 day. in 6 days he will do 1/ 3 part of work now adding the total amount of work they can do in 6 days

1/2+1/3=5/6

work left is 1-5/6=1/6