Reference no: EM132622524

Questions -

Q1. If A and B are two events such that P(A) = 0.35, P(B) = 0.45 and P(A and B)= 0.20, what is P(B given A)? Work to two decimal places.

A. 0.60

B. 0.80

C. 0.44

D. 0.57

E. None of these choices is correct.

Q2. After flipping a fair coin 5 times and getting 5 tails in a row, what is the probability of getting a tail on the next toss?

A. 1.00

B. 0.50

C. 0.99

D. 0.02

E. 0.25

Q3. In a normal distribution with mean 50 and variance 16, within what values would we expect approximately 95% of values to lie?

A. Within (42, 58)

B. Within (2, 98)

C. Within (18, 82)

D. Within (0, 100)

E. Within (38, 62)

Q4. Assume that sales in a café are normally distributed with a mean of $7 and a standard deviation of $3. What is the probability that one randomly selected sale is less than $8?

A. 0.7586

B. 0.3707

C. 0.2586

D. 0.6293

E. 0.3333