Answer:
Please see the attachment for double number line.
Explanation:
We are given cost of 4 water bottles is $10
We can write ,
Cost of 4 bottles = $10
Cost of 1 bottle = $2.5
Cost of 2 bottles =$5
Cost of 3 bottles = = $7.5
Cost of n bottles = $2.5n
Now we draw the double number line.
Bottom line(Line 1) will take as number of bottles:
1 2 3 4 5 6
Above line (Line 2) will show the cost of corresponding number of bottles:
2.5 5 7.5 10 12.5 15
Answer:
a) 20%
b) 80%
c) There is 4% probability that both will be marketing majors.
d) There is a 36% probability that at least one will be a marketing major.
Step-by-step explanation:
At your school, 20% of the class are marketing majors.
This means that for each student, there is a 20% that he is a marketing major and an 80% chance that he is not a marketing major.
a) What is the probability that the first partner will be a marketing major?
The probabilities for each student are independent, so it is 20%.
b) What is the probability that the first partner won't be a marketing major?
80%
c) What is the probability that both will be marketing majors?
For each one, it is 20%. So:
There is 4% probability that both will be marketing majors.
d) What is the probability that at least one will be a marketing major?
That is one of them or both. For both, we found in c) that it is 4%.
For one of them, there are two cases. Either the first partner is and the second is not, or the other way. So, the probability that at least one will be a marketing major is
There is a 36% probability that at least one will be a marketing major.