shenzhou1 shenzhou1

29-10-2022
Mathematics

Answered

Katie is one of ten members of a social club. Each week one member is selected at random to win a prize.

i. What is the probability that in the first 7 weeks Katie will win at least 1 prize?

ii. Show that in the first 20 weeks Katie has a greater chance of winning exactly 2 prizes than of winning exactly 1 prize.

iii. For how many weeks must Katie participate in the prize drawing so that she has a greater chance of winning exactly 3 prizes than of winning exactly 2 prizes?

Answer :

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