Which of the following describes a simple event?

a. spinning “back 2 spaces” on a spinner and drawing a blue or red marble from a box
b. spinning “back 2 spaces” on a spinner
c. rolling an odd number on a die and getting tails on the toss of a coin
d. tossing a coin 5 times and getting heads twice

Option B is correct.

Step-by-step explanation:

B- Spinning “back 2 spaces” on a spinner is a simple event. The probability that it will get 2 spaces back from where it started first is a single event.

A involves probability of landing 2 spaces back along with the probability of drawing a blue or red marble from a box. This is compound event.

C also involves 2 probabilities.The probability of getting an odd number on a die plus the probability of getting tails on the toss of a coin.  

D involves 5 probabilities with one probability for each toss.  

Therefore, option B is correct.

correct answer is c. just did it

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15