Question

1) Consider the discrete probability distribution to the right when answering the following question. Find the probability that x exceeds 4.

A) 0.97

b) 0.39

c) 0.58

D) 0.61

2)

The on-line access computer service industry is growing at an extraordinary rate. Current estimates suggest that 15% of people with home-based computers have access to on-line services. Suppose that 12 people with home-based computers were randomly and independently sampled. What is the probability that at least 1 of those sampled have access to on-line services at home?

Question 5 options:

	A) 0.8791
	B) 0.1209
	C) 0.2774
	D) 0.8329
	E) 0.9648

3)

Find the expected value of the random variable. Round to the nearest cent unless stated otherwise.

In a game, you have a  probability of 1/50 winning 106$ and a 49/50 probability of losing 3$. What is your expected value?

Question 7 options:

	A) -$0.82
	B) $5.06
	C) $2.12
	D) -$2.94

Thank you!!!!

Answer 1

Solution:

Question 1 can not be answered as you have not attached the probability distribution for this question.

Question 2:

We are given:

We are required to find

Using the complementary law of probability, we have:

Now using the binomial distribution formula, we have:

  

  

Therefore, the probability that at least 1 of those sampled have access to on-line services at home is 0.8578

3)

Find the expected value of the random variable. Round to the nearest cent unless stated otherwise.

In a game, you have a  probability of 1/50 winning 106$ and a 49/50 probability of losing 3$. What is your expected value?

Answer: The expected value is:

Therefore, the correct answer is -$0.82