5. bart is a student in a history class. in order for bart to receive an a grade for the course, he must score higher than an 85 on the final exam (out of a possible 1 to 100 score). what is the probability that bart will not score higher than an 85 and receive an a in the course ?

The probabability is

Step-by-step explanation:

We are going to suppose that each score has the same probability.

For example :

Where P(66) is the probability of score a 66 and P(89) is the probability of score an 89

If A is a certain score :

In the exercise :

Bart must score higher than an 85 on the final exam.

We are looking for the probability of the event : ''Bart obtains a 1 or a 2 or ... or a 85''

This can be written in terms of events as :

P(1∪2∪...∪85) = P(1) + P(2) + ... + P(85)

As we consider each event as independent

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!

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step-by-step explanation: