One professor grades homework by randomly choosing 5 out of 9 homework problems to grade. (a) How many different groups of 5 problems can be chosen from the 9 problems? groups (b) Probability extension: Jerry did only 5 problems of one assignment. What is the probability that the problems he did comprised the group that was selected to be graded? (Round your answer to four decimal places.) (c) Silvia did 7 problems. How many different groups of 5 did she complete? groups What is the probability that one of the groups of 5 she completed comprised the group selected to be graded? (Round your answer to four decimal places.)

One professor grades homework by randomly choosing 5 out of 9 homework problems to grade. (a) How many different groups of 5 problems can be chosen from the 9 problems? groups (b) Probability extension: Jerry did only 5 problems of one assignment. What is the probability that the problems he did comprised the group that was selected to be graded? (Round your answer to four decimal places.) (c) Silvia did 7 problems. How many different groups of 5 did she complete? groups What is the probability that one of the groups of 5 she completed comprised the group selected to be graded? (Round your answer to four decimal places.) One professor grades homework by randomly choosing 5 out of 9 homework problems to grade. (a) How many different groups of 5 problems can be chosen from the 9 problems? groups (b) Probability extension: Jerry did only 5 problems of one assignment. What is the probability that the problems he did comprised the group that was selected to be graded? (Round your answer to four decimat places.) (c) Silvia did 7 problems. How many different groups of 5 did she complete? groups What is the probability that one of the groups of 5 she completed comprised the group selected to be graded? (Round your answer to four decimal places.)