app.edulastic.com/student/
This item has two parts.
A high school teacher surveyed 700 junior and senior students to see whether they preferred biology or chemistry.
- Out of all the juniors surveyed, 35% said they preferred chemistry.
- Out of all the students surveyed, 56% said they preferred biology.
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PART A. Complete the two-way table that shows how many junior and senior students preferred each science course.
Chemistry
(a)
Biology
Juniors
Seniors
Total
(b) Part B. What is the exact probability that a student is a senior given that the student preferred biology?

Pls help.