SOLUTION: hello, I have a story problem I could use some help with if you have time,

Question 21467: hello, I have a story problem I could use some help with if you have time, A bag contains 6 red marbles, 9 blue marbles, and 5 green marbles. You withdrew one marble, replaced it, and then withdrew another marble. What is the probabilty that you do NOT pick 2 green marbles?
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
A bag contains 6 red marbles, 9 blue marbles, and 5 green marbles. You withdrew one marble, replaced it, and then withdrew another marble. What is the probabilty that you do NOT pick 2 green marbles?
IN SUCH PROBLEMS IT IS EASIER TO FIND PROBABILITY OF DRAWING 2 GREEN MARBLES AND SUBTRACT IT FROM 1 TO GET THE PROBABILITY OF NOT DRAWING 2 GREEN MARBLES.
IN THE 1ST.TRIAL PROBABILITY OF DRAWING GREEN MARBLE =5/(6+9+5)=5/20=1/4
SINCE THE MARBLE IS REPLACED AFTER 1ST.WITHDRAWAL THE PROBABILITY OF DERAWING GREEN MARBLE AT SECOND ATTEMPT IS ALSO SAME AS FIRST =1/4
HENCE PROBABILITY OF DRAWING 2 GREENS =(1/4)*(1/4)=1/16
HENCE OF PROBABILITY OF NOT DRAWING 2 GREEN MARBLES =1-1/16=15/16
RELATED QUESTIONS
HI, I have a story problem I'm having a difficult time with, I was wondering if somebody... (answered by venugopalramana)

You have a bag of marbles. There are twice as many blue marbles as red marbles. There... (answered by edjones)

I have an unlimited number of bags containing marbles. Each bag contains only two colors (answered by lynnlo)

How would I solve this problem: “A bag contains 4 red, 6 white and 9 blue marbles. How... (answered by greenestamps,math_tutor2020)

Please help me. We are working on probability and I am not so good with it. I am not sure (answered by checkley75)

A bag contains 5 blue marbles, 6 red marbles, and 9 green marbles. Two marbles are drawn... (answered by stanbon)

A bag contains 5 red marbles, 6 blue marbles, 9 white marbles and 9 yellow marbles. You... (answered by )

A bag contains 6 red marbles, 4 blue marbles, 7 white marbles and 9 yellow marbles. You... (answered by edjones)

I NEED HELP WITH MY MATH PROBLEM. BASICALLY THERE IS A BAG FULL OF MARBLES AND THERE ARE... (answered by stanbon)