The scores on a test were distributed as shown below for a class of 60 students. Convert the frequency histogram to a probability distribution. What is the probability that a student had a score of at least 90? What is the probability that a student failed the test (F grade), assuming that a score less than 70 was considered an F?

Transcribed Image Text:

Range 50-59 60-69 Number 4 9 70-74 7 75-79 80-84 85-89 90-94 95-100 11 13 7 6 3