A certain virus infects one in every 700 people. A test used to detect the virus in a person. (Round answers to four places.)   Positive Negative Infected 413 70 Not Infected 77 140 (b) Find the probability that a person does not have the virus given that

The probability that a salmon swims successfully through a dam is 0.85. Find the probability that two salmon swim successfully through the dam. Round to four decimal places.

A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1471 and the standard deviation was 318. The test scores of four students selected at random are 1910, 1210, 2210, and 1370. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1910 is (Round to two decimal places as needed.)

You roll a fair six sided die twice. Find the probability of rolling a 1 the first time and a number greater than 5 the second time. (Give the answer as a decimal with 4 digits)