1 (Exercise 11b 1-4) 2 (Exercise 8b 1-5)
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11b
1. Probability(Friend's father picked at random wears size 9 shoes)= 28/100=7/25(Ans)
2.Probability(Girl is chosen)=323/(323+357)=19/40
3.Probability (winning by one ticket)=300/1.5 mil
4.Probability(person at least 150 cm tall)=92/100
Probability(person is less than 150 cm tall)= 1-(92/100)=2/25
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