SOLUTION: A box contains blue and green balls in ratio 3:4.If there are 21 balls in the box and 2 balls are taken one after the other without replacemen.What is the probability that the two

Algebra.Com
Question 623169: A box contains blue and green balls in ratio 3:4.If there are 21 balls in the box and 2 balls are taken one after the other without replacemen.What is the probability that the two balls are of the same colours?
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi, Previously Posted
A box contains blue and green balls in ratio 3:4. 21 balls in the box
b = and .75g + g = 21,
12 green and and 9 blue, total of 21
2 balls are taken one after the other without replacement
P(2 balls are the same color) = P(both Green) + P(both blue) =
RELATED QUESTIONS

A box contains blue and green balls in ratio 3:4.If there are 21 balls in the box and 2... (answered by ewatrrr)
A box contains blue and green balls in the ratio 3:4. If there are 21 balls in the box... (answered by Boreal)
A box contains 5 red,3 green and 4 blue balls of the same size.if a boy picks two balls... (answered by Fombitz)
In a box there are 9 red balls and 4 green balls. Part a. Two random balls are taken... (answered by ikleyn)
A basket contains green, black and blue balls in the ratio 5:2:1. If there are 10 blue... (answered by ewatrrr)
A box contains 4 red balls and 6 blue balls. A second box contains 16 red balls and an... (answered by reviewermath)
Three boxes containing red, white and blue balls are used in an experiment. Box 1... (answered by CPhill)
a box contains 12 balls of which 4 are green and 8 are red. if 7 balls are drawn from the (answered by Edwin McCravy)
A box contains 4 red balls, 6 black balls, 8 blue balls and 12 white balls. What... (answered by macston)