Mathematics for IGCSE & O level - Probability (Section 7 - No. 16)
A jar contains 8 red balls and 12 blue balls. If you randomly select a ball, what is the probability of choosing a red ball?
2/5
3/5
8/12
1/2
คำอธิบาย
There are 8 red balls, total balls = 8 red + 12 blue = 20. Probability = 8/20 = 2/5.