Question
A bag consists of 4 different colored marbles.
The probability of drawing each is as follows:
P (Blue)=. 4 P (Red)= .2 P (Purple)= .3 P (Black)= .1
You draw a marble out of the bag and then replace it.
What is the probability that you draw:
a. A red marble first and a blue marble second?
b. A black marble first and a purple marble second?
c. A red or blue marble?
d. A gray marble?
The probability of drawing each is as follows:
P (Blue)=. 4 P (Red)= .2 P (Purple)= .3 P (Black)= .1
You draw a marble out of the bag and then replace it.
What is the probability that you draw:
a. A red marble first and a blue marble second?
b. A black marble first and a purple marble second?
c. A red or blue marble?
d. A gray marble?
Answers
Anonymous
as long as you REPLACE
.2 * .4
.1 * .3
.2 + .4 http://www-math.bgsu.edu/~albert/m115/probability/add_probs.html
0 because no gray in the bag
.2 * .4
.1 * .3
.2 + .4 http://www-math.bgsu.edu/~albert/m115/probability/add_probs.html
0 because no gray in the bag
Damon
note
probability of blue or red or purple or black better be 1.000000 :)
add them up to check
probability of blue or red or purple or black better be 1.000000 :)
add them up to check