Answer:
Step-by-step explanation:
They're mutually exclusive events so you can add their probabilities to get their union
(assuming a fair die) the odds of rolling a six on the first role is 1/6
The odds of rolling an odd number on the second role is 1/2
1/6+1/2= 4/6=2/3= .667
Answer:
![b/a\ hours](https://tex.z-dn.net/?f=b%2Fa%5C%20hours)
Step-by-step explanation:
we know that
Betsy can clean a/b of the house in an hour
The whole house (100%) correspond to the number 1
so
using proportion
Find out how long will it take her to clean the whole house
![\frac{(a/b)}{1}=\frac{1}{x} \\ \\x=1/(a/b)\\ \\x=b/a\ hours](https://tex.z-dn.net/?f=%5Cfrac%7B%28a%2Fb%29%7D%7B1%7D%3D%5Cfrac%7B1%7D%7Bx%7D%20%5C%5C%20%5C%5Cx%3D1%2F%28a%2Fb%29%5C%5C%20%5C%5Cx%3Db%2Fa%5C%20hours)
You divide them, so 1,125 divided by 15=25. So your Answer is 75 students are on each bus.
I believe the answer is b= -5