What does it mean if the probability is 20% that a spinner will stop in a red section?

a.
there is one chance in 5 that the spinner will stop in a red section.

b.
it is 20 times more likely that the spinner will stop in a red section than any other section.

c.
if the spinner is spun 100 times it is certain that it will stop in the red section exactly 20 times.

d.
there is one chance in 20 that the spinner will stop in a red section.

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Can someone me out here and the tell me the greatest common factor

Why is studying fractions important