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arsen [322]
2 years ago
6

A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls invol

ve fax messages, and consider a sample of 25 incoming calls. What is the probability that
a. At most 6 of the calls involve a fax message?
b. Exactly 6 of the calls involve a fax message?
c. At least 6 of the calls involve a fax message?
d. More than 6 of the calls involve a fax message?
e. What is the expected number of calls among the 25 that involve a fax message?
f. What is the standard deviation of the number among the 25 calls that involve a fax message?
g. What is the probability that the number of calls among the 25 that involve a fax transmission exceeds the expected number by more than 2 standard deviations?
Mathematics
1 answer:
Andre45 [30]2 years ago
6 0

Answer:

b

Step-by-step explanation:

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<u>Answer:</u>

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<u>Step-by-step solution:</u>

We are given an expression:

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We have only one variable w so we will make w the subject and solve for it.

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Solving the brackets first to get:

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Taking LCM on both sides to get:

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By cross multiplication:

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telo118 [61]
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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