Question

13) The table below shows

a list of students in math
classes based on their
grade and class. If you
pick a student at random,
what is the probability
they are in Algebra 2 given
that they are a 10th
grader?

Answer 1

60/257 or .233

Explanation:

P (algebra 2 | 10th grade) = # algebra 2 in 10th grade / # 10th graders

Total number of 10th graders = 85 + 100 + 60 + 10 + 2 = 257

Algebra 2 students in 10th grade = 60 (look at the intersection of the 10th grade column and the algebra 2 row)

P (algebra 2 | 10th grade) = 60/257

Answer 2

0.09

Explanation:

The total number of students is 666

and 60 10th grade students offer algebra 2

60÷666

0.09