The mean number of words per minute (WPM) typed by a speed typist is 143 143
with a standard deviation of 12
12
WPM.

What is the probability that the sample mean would be greater than 142.2
142.2
WPM if 76
76
speed typists are randomly selected?

Two trains leave a station on different tracks. the tracks make an angle of 130°, with the station as a vertex. the first train travels 100 km and makes its first stop at point a, while the second train travels 200 km and makes it first stop at point b. how far apart are the trains when both are at their first stop? round the answer to the nearest integer. a) 65 km b) 139 km c) 224 km d) 275 km