SOLUTION: If there are 30 pieces of paper in a hat and 4 of them have your name on them. What is the probability of drawing your name if you get to draw 2 pieces of paper at random. Order do
Algebra ->
Probability-and-statistics
-> SOLUTION: If there are 30 pieces of paper in a hat and 4 of them have your name on them. What is the probability of drawing your name if you get to draw 2 pieces of paper at random. Order do
Log On
Question 437553: If there are 30 pieces of paper in a hat and 4 of them have your name on them. What is the probability of drawing your name if you get to draw 2 pieces of paper at random. Order does not matter.
Once the first piece of paper is drawn, it is not added back into the hat. Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! nCr=combination of n things taken r at a time = n!/((n-r)!*r!)
(4C0 * 26C2)/30C2
26C2=26!/(24!*2!)=325
30C2=30!/(28!*2)=435
=325/435
=65/87 Probability of your name not being drawn.
1 - 65/87 = 22/87 the probability of drawing your name if you get to draw 2 pieces of paper at random.
.
Ed
