A bag has 5 red and 3 blue balls. What is the probability of drawing 2 red balls?
A
5/14
B
10/28
C
10/56
D
5/28
Correct Answer: Option A — 5/14
Explanation:
P = C(5,2)/C(8,2) = 10/28 = 5/14. C(5,2)=10 favorable outcomes from C(8,2)=28 total. This is a combination-based probability problem. When drawing without replacement order does not matter so combinations are used. Such problems appear in probability sections of CSS FPSC and higher competitive examinations.