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All freshmen, sophomores, juniors, and seniors attended a high school assembly. The total student attendance is shown in the table.

A 2-column table has 4 rows. The first column is labeled Class with entries freshmen, sophomores, juniors, seniors. The second column is labeled Number of people with entries 31, 10, 17, 22.

Twice during the assembly, a student is chosen at random to assist with the presentation. After the first student has finished assisting, the student returns to the group and can be chosen a second time. What is the probability that the first student chosen is a senior and the second student chosen is a sophomore?

StartFraction 11 Over 320 EndFraction
StartFraction 3 Over 80 EndFraction
StartFraction 11 Over 40 EndFraction
Two-fifths

Sagot :

Answer:

11/320

Step-by-step explanation:

edge

The probability that the first student chosen is a senior and the second student chosen is a sophomore is equal to 11/320.

What is probability?

Probability is the likeliness of happening an event among all the events that are possible. It lies between 0and 1 and cannot be negative.

How to calculate probability?

We have been given that the number of freshmen is 31, number of sophomores is 10, juniors is 17 and seniors be 22. Total number of persons be 31+10+17+22=80

let X denote person.

Probability that the first student is senior and second one is a sophomore=P(X=Senior)*P(X=Sophomore)

=22/80*10/80

=220/6400

=11/320

Hence the probability that the first student is senior and second one is a sophomore is 11/320.

Learn more about probability at https://brainly.com/question/24756209

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