A box contains 3 blue crayons, 3 white crayons, 2 red crayons, and 4 purple crayon. You pick a crayon at random, replace it, and then pick another crayon at random. What is the P(purple, red)=
3 + 3 + 2 + 4==12 - total number of crayons
Probability of picking a purple crayon ==4 / 12 ==1 / 3
Probability of picking a red crayon == 2 / 12 ==1 / 6
Since the first crayon was replaced, therefore:
The probability of picking a purple crayon followed by a red crayon is:
1/3 x 1/6 = 1/18