Question

Question 5 (Multiple Choice Worth 2 points)

(09.03)

Jean bought a bag of candy that contained red candies, green candies, and brown candies. Some candies are marked with a smile, and others are not marked. The probabilities are displayed in the table below:


Red Green Brown
Smile 0.10 0.30 0.10
No smile 0.20 0.15 0.15


If a random candy is chosen from this bag, what is the probability that the candy was red or had no smile?
0.60
0.20
0.30
0.50

Answer 1

Hint
Red or had no smile
= 0.10+0.20+0.15+0.15

Answer 2

| Red |Green | Brown Total
Smile |0.100 | .300 | .10 0.50
No smile |0.200 | .150 | .15 0.50
Total 0.30 0.45 0.25 1.00

The probability of choosing red candy is 0.10
The probability of choosing no smile candy is 0.50

The probability of choosing red or no smile = 0.10 + 0.50 = 0.60

I did not use 0.30 as the probability of red because it included the no smile candy. It should only be red candy that has a smile.