Two groups of male students cast their votes on a particular proposal. The result are as follows:
In favor | Against | |
Group A | 128 | 32 |
Group B | 96 | 48 |
If a student in favor of the proposal is selected for a post, what is the probability that he is from group A?
- A.
8/19 - B.
16/35 - C.
10/19 - D.
4/7 - E.
4/5
Correct Answer: Option A
Explanation
Probability that a student in favor is group A
= (frac{128}{128 + 32 + 96 + 48})
= (frac{128}{304})
= (frac{8}{19})