The time between arrivals of customers at an automatic tellermachine is an exponential random variable with a mean of 5minutes. a) what is the probability that more than threecustomers arrive in 10 minutes? b) what is the probability that the time until the 5thcustomer arrives is less then 15 minutes?

What is the value of x in the diagram below?

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,