Question

Asked Oct 1, 2019

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Step 1

**Note:**

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Step 2

**Introduction:**

If *X* ~ Bin (*n*, *p*), then the probability mass function of *X* is:

*p* (*x*) = (* _{n}*C

Here, number of trials is the number of questions in the weekly quiz, *n* = 10.

Step 3

**Part a:**

Consider the event of getting a question correct as a success.

In the quiz, *P* (getting a question wrong) = 0.8.

The remaining probability must be the probability of getting the question correct. Thus, *P* (getting a question correct) = 0.2 (= 1 – 0.8).

Thus, the probability of success is, *p* = 0.2.

Denote *X* as the number of correct answers, that is, the number of successes in *n* = 10 trials.

Assum...

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