Question

If a marble is randomly chosen from a bag that contains exactly 8 red marbles, 6 blue marbles, and 6 white marbles, what is the probability that the marble will not be white?

Answer 1

The probability is 14/20......

Answer 2

Answer:

Step-by-step explanation:. ok, so theres 8 red marbles, 6 blue marbles, and 6 white marbles so that makes  

8 + 6 + 6 = 20 marbles in total  

the probability of the marble being white is 6/20 or 3/10  

so the probabilty of the marble NOT being white is 1 - (3/10) = 7/10  

and that matches up with choice e)  

2. so the ratio of the sides of a triangle is 12:14:15, and the second one is similar. for this one we have to set up a proportion  

since the shortest side of the second side is 8 inches, we can match it up with the shortest ratio of the first. and we kno the ratio of the longest side of the first triangle is 15, but we dont kno the the length of the longest side of the second triangle, so we can let that be our unknown, x. so the proportion we are going to set up is  

8 / 12 = x / 15  

now cross multiply  

12x = 120  

x = 10  

so the length of the longest side of the second triangle is 10 inches  

that matches up with choice b)

OR  

1. 1 - 6/20 = 1 - 3/10 = 7/10  

(e) 7/10  

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Ideas: Use complement set.  

2. x:8 = 15:12 = 5:4  

(b) 10.0