Answer:
1/400
Step-by-step explanation:
3/1200 = 1/400
1) Sample space would consist of the 1200 names of the students
2) out of those 1200 outcomes, this event composes of three outcomes which are:
1) Sophie
2) Hannah
3) Ethan
6 boxes (add the cumulatively)
each box bas 5 pkgs so 10w,5o
1st box: 10w,5o
2nd box:20w,10o
3rd box:30w,15o
4th box:40w,20o
5th box:50w,25o
6th box:60w,30o
You need a min. of 48w and 27o