the table below:
Grade     In favor  Opposed Undecided   Total
Grade 9 Â Â 6 Â Â Â Â Â Â Â Â Â 4 Â Â Â Â Â Â Â Â Â Â Â 8 Â Â Â Â Â Â Â Â 18
Grade 10 Â Â 10 Â Â Â Â 11 Â Â Â Â Â Â Â Â Â Â Â Â 9 Â Â Â Â Â Â Â Â 30
Grade 11 Â Â 12 Â Â Â Â 15 Â Â Â Â Â Â Â Â Â Â Â 11 Â Â Â Â Â Â Â Â Â 38
Grade 12 Â Â 15 Â Â Â Â 6 Â Â Â Â Â Â Â Â Â Â Â 14 Â Â Â Â Â Â Â Â Â 35
If the principal randomly selects a student in grade 10 from this survey,
the probability that the student is opposed to extending the school day
P ( student in grade 10 is opposed)= Number of student in opposed(grade10) / total number of students in grade 10
Number of student opposed who is in grade10 = 11
total number of students in grade 10 = 30
P( student in grade 10 is opposed)= Â [tex]\frac{11}{30}[/tex]
= 0.37
the probability that the student is opposed to extending the school day= 0.37
