Question

The probability that Shania is on time for school is 1/2. Find the probability that Shania arrives on time for school for the next 5 days. Express your answer as a percent, to the nearest tenth of a percent.

A. 50%

B. 15.6%

C. 11.4%

D. 3.1%

Answer 1

well....she has a 50% chance of getting to school on time on any given day....so the percent wont change no matter how many days she goes....she will always have a 50% chance of getting to school on time....in 5 days....she has a

(50% + 50% + 50% + 50% + 50%) / 5

50%

Answer 2

Thanks

Answer 3

Using the binomial distribution the proability of arriving on time for the next 5 days is
\[P(5\ days\ on\ time)=(0.5)^{5}=.03125\]
This probability rounded is 3.1%

Answer 4

probability*

Answer 5

I guess I was wrong....thanks @kropot72
havent done probabilities in a while

Answer 6

You're welcome :)