Consider such events:
A - selected student is freshmen
B - selected student is girl
- selected student is freshman is girl
- choosen girl is freshmen.
Use formula
.
From the table you can see that girls that are freshmen are 4 from all 30 people, then
. There are 18 girls, then
. Substitute into the formula:
.
Answer:
.
The commutatice property for addition says a+b=b+a
If it was for subtraction, then it would be a-b=b-a
Take a=7 and b=5
7-5 is not equal to 5-7
2 is not equal to -2
So subtraction is not commutative for whole numbers.
Hope this helps :)
Change in y over the change in x
-1-7=-8
1- -3=4
-8 divided by 4
Slope=-2
Step-by-step explanation:
7 students were in the van so 187 - 7 = 180. 180 ÷ 4 = 45, there were 45 students on each bus. Not sure if this makes total sense, hope it helps