There are 9 blue balls, 7 yellow balls and 4 red balls. What is the probability of picking a red ball?
- 1/5
- 1/6
- 1/7
- None of these
Explanation
Total number of balls = Blue + Yellow + Red
Total = 9 + 7 + 4 = 20
Number of red balls = 4
Probability of picking a red ball = Number of red balls / Total number of balls
= 4 / 20
= 1 / 5
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