Sagot :
18days / 7 students = 1 student use 2.57 days to complete
3 students x 2.57 days = 3 students use 7.71 days to complete
If complete half 7.71 days / 2 = 3 students use 3.86days to complete half
3 students x 2.57 days = 3 students use 7.71 days to complete
If complete half 7.71 days / 2 = 3 students use 3.86days to complete half