Jamey wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below: In favor Opposed Undecided Grade 9 5 3 9 Grade 10 8 12 9 Grade 11 15 16 10 Grade 12 12 6 11 If the principal randomly selects a student in grade 9 from this survey, what is the probability that the student is in favor of extending the school day?

Question

Mathematics

Eloise

5 August, 20:35

Jamey wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below: In favor Opposed Undecided Grade 9 5 3 9 Grade 10 8 12 9 Grade 11 15 16 10 Grade 12 12 6 11 If the principal randomly selects a student in grade 9 from this survey, what is the probability that the student is in favor of extending the school day?

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Dixie Wiley · Answer 1

Table

In favor Opposed Undecided

Grade 9 5 3 9

Grade 10 8 12 9

Grade 11 15 16 10

Grade 12 12 6 11

Probability = number of positive outcomes / number of possible outcomes

Probability that a student in grade 9 is in favor of extending the school day =

number of students in 9 grade in favor / number of students in grade 9

number of students in 9 grade in favor = 5

number of students in 9 grade = 5 + 3 + 9 = 17

Probability = 5 / 17

Answer: 5 / 17