Question
Melissa has 10 coins in her pocket.
2 quarters
3 dimes
4 nickel
1 penny
What is the theoretical probability of pulling a quarter out of your pocket, putting it back, then pulling out a penn?
My answer is 1/50
Also what is the theoretical probability of pulling a nickel out of your pocket, spending it, than pulling the penny out of your pocket?
My answer is 1/45
2 quarters
3 dimes
4 nickel
1 penny
What is the theoretical probability of pulling a quarter out of your pocket, putting it back, then pulling out a penn?
My answer is 1/50
Also what is the theoretical probability of pulling a nickel out of your pocket, spending it, than pulling the penny out of your pocket?
My answer is 1/45
Answers
Reiny
Your first answer is correct.
the second:
prob(nickel, then penny)
= (4/10)(1/9)
= 4/90
= 2/45
the second:
prob(nickel, then penny)
= (4/10)(1/9)
= 4/90
= 2/45