the bag contains 20 red marbles and30 white marbles and 40 blue ones what is the ratioof red to blue marbles what is the ratio of white to red if one marble is drawn from the bag what is the probability that the marble will not be white??? need ansewr fastt plzz
r/b = 20/40 = 1/2
w/r = 30/20 = 3/2
(r+b)/(r+b+w) = (20+40)/(20+40+30) = 2/3
or, 1 - 30/90 = 2/3
2/3Y + 1/6 Y+ Y=
To find the ratio between red and blue marbles, divide the number of red marbles by the number of blue marbles:
Ratio of red to blue marbles = 20 red marbles / 40 blue marbles
= 1/2
To find the ratio between white and red marbles, divide the number of white marbles by the number of red marbles:
Ratio of white to red marbles = 30 white marbles / 20 red marbles
= 3/2
To find the probability that a marble drawn from the bag will not be white, you need to find the total number of marbles in the bag and then subtract the number of white marbles. Finally, divide the result by the total number of marbles:
Total marbles in the bag = 20 red marbles + 30 white marbles + 40 blue marbles
= 90 marbles
Probability of not drawing a white marble = (90 - 30 white marbles) / 90 marbles
= 60 / 90
= 2/3
So, the probability of not drawing a white marble is 2/3.