A bag contains 12 red marbles, 5 yellow marbles, and 15 green marbles. How many additional red marbles must be added to the 32 m
arbles already in the bag so that the probability of randomly drawing a red marble is ? Select your answer. 13 18 28 32 40
1 answer:
Answer:
= 18 red marbles
Step-by-step explanation:
Let x be the number of red marbles that must be added
Therefore;
New number or red marbles = x+12
Total marbles will be x+32
Thus;
The probability of selecting a red marble = (x+12)/(x+32)
Therefore;
(x+12)/(x+32)=3/5
5(x+12)=3(x+32)
5x+60+3x+96
2x=36
x=18
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Answer:
2
Step-by-step explanation:
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-22 is your answer because all you have to do is take 4 away from -18 and you get -22
Make an equation.
.1 X .5 X n = .25 X n - 30
.05n = .25n - 30
30 = .20n
150 = n
20 because there are many more
(5 * 2) - (8 + 3) = 10 - 11 = -1
