Question

A junior high principal runs a report to determine what ratio of all 100 students take the bus to school or are dropped off by parents, based on grade (seventh grade or eight grade). The results are shown in the following probability distribution table.
Grade vs.
Transportation Takes
Bus Parents
Drop off Total
Seventh Grader 0.44 0.12 0.56
Eighth Grader 0.11 0.33 0.44
Total 0.55 0.45 1
What is the probability that a student is in seventh grade, given that he/she is dropped off by parents?
0.27
0.38
0.22
0.73

Answer 1

The probability that a student is in seventh grade, given that he/she is dropped off by parents is option C) 0.22

Step-by-step explanation:

• The total probability of students in 7th grade = 0.56
• The probability of 7th grade students dropped by parents = 0.12

P(student is in 7th grade student is in seventh grade) = P(students in 7th grade) / P(7th grade students dropped by parents).

⇒ 0.12/0.56

⇒ 0.22

Answer 2

Answer:

The correct answer is 0.27 :)

Step-by-step explanation: