Answer
P(math score of 700 or higher) = 75% = 0.75
Work Step by Step
If the middle 50% of enrolled freshmen had SAT math scores in the range 700–780, we conclude that 25% of enrolled freshmen had SAT math scores $\lt$ 700 and the other 25% had SAT math scores $\gt$ 780. So:
P(math score of 700 or higher) = 50% + 25% = 75%
