Please work 2. A bag contains 20 apples, 20 bananas and 20 oranges. 1f I pick one piece of fruit
out of the bag every minute, how long it will be before I am assured of having picked a) at least a
dozen of apples. b) at least a dozen of apples or bananas.
Solution
4)
a)
Assume that the oranges and bannaas are all picked first and this will take 40 minutes. Then the
remaining 12 apples are chosen so it would take 40+12=52 min to be assured.
b)
Assume all the oranges are picked and that takes 20 min. Then there are only apples and bananas
so there other 12 can be any of the 40 that are left.
20+12=32 min.
Please work 2. A bag contains 20 apples, 20 bananas and 20 orang.pdf
1. Please work 2. A bag contains 20 apples, 20 bananas and 20 oranges. 1f I pick one piece of fruit
out of the bag every minute, how long it will be before I am assured of having picked a) at least a
dozen of apples. b) at least a dozen of apples or bananas.
Solution
4)
a)
Assume that the oranges and bannaas are all picked first and this will take 40 minutes. Then the
remaining 12 apples are chosen so it would take 40+12=52 min to be assured.
b)
Assume all the oranges are picked and that takes 20 min. Then there are only apples and bananas
so there other 12 can be any of the 40 that are left.
20+12=32 min
