Question

Roberto has a bag that contains 7 blue, 5 purple, 12 red, and 6 orange marbles. If he draws one marble at random from the bag, what is the probability of selecting a RED or ORANGE marble?

Answer 1

60%

Explanation:

There are 7 blue, 5 purple, 12 red, and 6 orange marbles.

There are 30 marbles in all.

There are 18 red and orange marbles. There are 18 preferred events and 30 total events.

`(preferred)/(total) =(18)/(30) =(6)/(10)=0.6 = 60`%

There should be 60% chance that Roberto would pick either a red or orange marble.

Answer 2

I'm giving you 3 different answers because I don't know if you need it as a fraction, decimal, or percent

7 + 5 + 12 + 6 = 30

12 + 6 = 18

18/30

simplify

18 / 2 = 9

30 / 2 = 15

9/15

change to a decimal

9 / 15 = .6

change to a percent

.6 x 100 = 60%