The scores of high school seniors on the ACT college entrance examination in a recent year had a mean of 19.2 and a standard deviation of 5.1. The distribution of scores is not exactly Normal (ACT score is clearly not a continuous variable) but the Normal curve is a close approximation. (I will show an example in class.)
What is the approximate probability that a single student randomly chosen from all those taking the test scores 27 or higher?

The approximate probability is .

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.