A survey regarding their favourite magazine(s) was conducted among 84 high school girls. Three magazines, namely Teen Vogue (T), Drum (D) and People’s Magazine (P) were used in the survey.
The results are as follows:
- 41 read Teen Vogue.
- 34 read People’s Magazine.
- 40 read Drum.
- 18 read Teen Vogue and Drum.
- 8 read all three magazines.
- 75 read at least one magazine.
- n( P and D) = 17.
The Venn-diagram below shows the above information.
10.1 Determine the values of a, b, c, d, e and f .(7)
10.2 Determine the probability that a randomly selected girl reads at least two of the three magazines.(2)