math
posted by dillon on .
a bag contains 33 green marbles and 25 blue marbles. you select a marble at random from the bag. find the theoretical probability of selecting a blue marble. thanks
Pr(blue)= number blue/total marbles

First, you would need to add 33+25 because you need to find the total number of marbles that are in the bag.
algebraic expression: 33+25=x
x=58
Next you would need to take the amount of blue marbles and make a fraction over the total amount. The fraction is 25/58. Therefore, the probability of selecting a blue marble is 25/38 
First, you would need to add 33+25 because you need to find the total number of marbles that are in the bag.
algebraic expression: 33+25=x
x=58
Next you would need to take the amount of blue marbles and make a fraction over the total amount. The fraction is 25/58. Therefore, the probability of selecting a blue marble is 25/58