Three persons 'A', 'B', and 'C' can complete a piece of work alone in 'x' days, 'x + 6' days, and 'x + 16' days respectively. 'B' started work alone and worked for 'y' days and after that 'A' and 'C' joined them. All together worked for 'y + 2' days and after that 'B' left them and the remaining work is completed by 'A' and 'C' together in 'y + 3' days. If the work done by 'A' in 6 days is equal to the work done by 'C' in 10 days then which of the following statement is correct?
1
Value of x - y = 21
2
Value of x + y = 25
3
A + C together can complete the work in 20 days.
4
Efficiency of 'B' = 75% × Efficiency of (A + C)
5
'x' and 'y' are co - prime to each other.