Question: SAT SCORES Results of a Department of Education survey of SAT test scores in 22 states showed that 10 states had an average composite SAT score of at least 1000 during the past 3 yr. 15 states had an increase of at least 10 points in the average composite SAT score during the past 3 yr. 8 states had both an average composite SAT score of at least 1000 and an increase in the average composite SAT score of at least 10 points during the past 3 yr.
a. How many of the 22 states had composite SAT scores of less than 1000 and showed an increase of at least 10 points over the 3-yr period?
b. How many of the 22 states had composite SAT scores of at least 1000 and did not show an increase of at least 10 points over the 3-yr period?