Find the probability.The manager of a bank recorded the amount of time each customer spent waiting in line during peak business hours one Monday. The frequency table below summarizes the results.
If a customer is selected at random, what is the probability that the waiting time is at least 12 minutes or between 8 and 15 minutes? Round your answer to three decimal places.
A. 0.087
B. 0.714
C. 0.5
D. 0.587
Answer: C
You might also like to view...
Determine whether the relation is a function.Tips earned by servers at a restaurant one evening:
A. A function B. Not a function
Write a description of the set.S = {4, 8, 12, 16, 20, . . .}
A. Set S is the set of integers that are greater than or equal to 4. B. Set S is the set of integers. C. Set S is the set of natural numbers greater than or equal to 4. D. Set S is the set of natural numbers that are multiples of 4.
Find the zeros of the polynomial function. State whether the graph crosses the x-axis, or touches the x-axis and turns around, at each intercept. f(x) = x4 - 49x2
A. x = 0, crosses the x-axis; x = 7, crosses the x-axis; x = -7, crosses the x-axis B. x = 0, touches the x-axis and turns around; x = 49, touches the x-axis and turns around C. x = 0, touches the x-axis and turns around; x = 7, crosses the x-axis; x = -7, crosses the x-axis D. x = 0, touches the x-axis and turns around; x = 49, crosses the x-axis
Simplify. Assume that all variables represent positive real numbers.
+ 
A. 9
B. 18
C. 3
D. 2