Kris 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
Grade9 6 4 8
Grade10 10 11 9
Grade11 12 15 11
Grade12 15 6 14

If the principal randomly selects a student in grade 10 from this survey, what is the probability that the student is opposed of extending the school day?
0.09

0.29

0.30

0.37

Question

Kris 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 
Grade9        6                 4                 8 
Grade10      10              11               9 
Grade11       12             15              11 
Grade12        15             6               14

If the principal randomly selects a student in grade 10 from this survey, what is the probability that the student is opposed of extending the school day? 
0.09

0.29

0.30

0.37

anonymous · Answer

Probability of opposed would be defined as the number of students who are opposed divided by the total number of students in grade 10 , i.e : 10/30 = 0.3

kropot72 · Answer

The number of Grade 10 students who are opposed is 11. Total students in Grade 10 is 30. Required probability is:
$$\large P(opposed)=\frac{11}{30}=you\ can\ do\ decimal\ conversion\ (rounded\ up)$$

anonymous · Answer

oh right, whoops, misread the number, it's 11

anonymous · Answer

so you get 0.37 as your answer

kropot72 · Answer

0.37 is the correct choice.

anonymous · Answer

Thank you! I really appreciate it!

kropot72 · Answer

You're welcome :)