SOLUTION: A. A class has 12 boys and 3 girls. If three students are selected at random from the class, what is the probability that they are all boys? B. A bead is drawn from a bag contai

Algebra ->  Probability-and-statistics -> SOLUTION: A. A class has 12 boys and 3 girls. If three students are selected at random from the class, what is the probability that they are all boys? B. A bead is drawn from a bag contai      Log On


   

Question 936609: A. A class has 12 boys and 3 girls. If three students are selected at random from the class, what
is the probability that they are all boys?
B. A bead is drawn from a bag containing 6 red beads, 4 green beads, 2 yellow beads and 3 blue beads. What is the probability that a bead drawn at random
1. is either a red bead or blue bead
2. is not a yellow or a red bead

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
A) P=%2812%2F15%29%2811%2F14%29%2810%2F13%29=44%2F91
B) P%28R%2CB%29=6%2F15%2B3%2F15=9%2F15=3%2F5
Not a yellow or red means its a green or blue.
P%28G%2CB%29=4%2F15%2B3%2F15=7%2F15