A bag contains seven red balls, five green balls, four yellow balls and two black balls. A ball is picked at random from the bag. What is the probability that the ball will be green or yellow?
A..278
B..222
C..5
D..45

The answer 50% but I don't see an option for 50 percent...

Step-by-step explanation:

7+5+4+2=18

there are 5 green and 4 yellow so 9 balls out of 18. There is a 50% chance that a green or yellow ball will be picked.

i think you would have to divide the money he had saved, which is $2,000 by the time he plans on exercising which is 40 hours, and the answer you get should tell you the answer to your question.