Question

A box has 5 red, 3 blue, 2 green balls. Probability of drawing a non-green ball?

• A. 0.5
• B. 0.8
• C. 0.6
• D. 0.7

Answer 1

Answer:

B. 0.8

Total balls = 5 red + 3 blue + 2 green = 10

Non-green balls = red + blue = 5 + 3 = 8

Probability of drawing a non-green ball:

$P(\text{non-green})=\frac{\text{Number of non-green balls}}{\text{Total number of balls}}=\frac{8}{10}=\frac{4}{5}$

Answer: (\frac{4}{5}) or 0.8 (80%).