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})