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Sauron
1 month ago
5

Kevin and Brittany write an equation to represent the following relationship, and both students solve their equation. Who found

the correct equation and solution? Why is the other person incorrect?
5 times the difference of a number and 20 is the same as half the sum of 4 more than 4 times a number.

Mathematics
1 answer:
Inessa [12.5K]1 month ago
3 0
Kevin, since the problem states a number (x) minus 20, and given that 20 is mentioned later, it indicates that it is the second number involved here.
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Answer:

(a) P(B) = 0.008, (b) P(A∩B) = 0, (c) Yes, events A and B are mutually exclusive, (d) P(A∪B)=0.948, (e) 0.948, (f) 0.06

Step-by-step explanation:

We are considering three scenarios:

A: filling to specs

B: underfilling

C: overfilling

In probability theory, the total of mutually exclusive events needs to equal 1, therefore, we have:

(a) P(B) = 1 - P(A) - P(C) = 1 - 0.940 - 0.052 = 0.008

(b) P(A∩B) = the probability of filling to specification while simultaneously underfilling = 0, since both cannot occur together

(c) Yes, A and B are indeed mutually exclusive events, as it's impossible for a machine to fill to specs and underfill concurrently

(d) For mutually exclusive events, we find:

P(A∪B) = P(A) + P(B) = 0.940 + 0.008 = 0.948

(e) The probability that the machine does not overfill aligns with the probabilities of filling to specs and underfilling, i.e., P(A) + P(B) = 0.948, because not overfilling indicates either meeting specs or underfilling.

(f) The probability of either underfilling or overfilling is:

P(C∪B) = P(C) + P(B) = 0.052 + 0.008 = 0.06 since C and B are mutually exclusive.

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