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Professor asked 42 students when they had studied for his class the
previous
week. Their responses were as follows;
9 had studied on Friday
18 had studied on Saturday
30 had studied on Monday
3 had studied on both Friday and Saturday
10 had studied on both Saturday and Monday
6 had studied on both Friday and Monday
2 had studied on Friday, Saturday and Monday
a) Represent the above information using a Venn
diagram.
[4 Marks]
b) Calculate the number of students who:

1.Did all of their studying on one day.

2.Studied on Monday but not on either Friday or
Saturday
3.Did not study at all for this class last week.