Question

A jar on your desk contains twelve black, eight red, ten yellow, and five green jellybeans. You pick a jellybean without looking. (a) What is the probability that the jellybean is red? Write your answer as a fraction. (b) What is the probability that the jellybean is not green? Write your answer as a fraction. (c) What are the odds in favor of picking a yellow jellybean?

Answer 1

Answer:

a.  $\dfrac{8}{35}$

b. $=\dfrac{6}{7 }$

c.  $2:5$

Step-by-step explanation:

Given : A jar on your desk contains twelve black, eight red, ten yellow, and five green jellybeans.

Total jellybeans = $12+8+10+5=35$

a) Then the probability that the jellybean is red :

$\dfrac{\text{Number of red jellybeans}}{\text{Total jellybeans}}=\dfrac{8}{35}$

b) The number of jellybeans are not green = 35-5=30

The probability that the jellybean is not green :

 $\dfrac{\text{Number of jellybeans not green}}{\text{Total jellybeans}}=\dfrac{30}{35}$

$=\dfrac{6}{7 }$

c) The odds is the ratio of the number of times evnt is posssible to number of times event is not possible.

Number of yellow jellybeans = 10

Number of jellybeans are not yellow = 35-10=25

Now, the odds in favor of picking a yellow jellybean : $10:25$

i.e. $2:5$