Question

a bag contains 3 red marbles 4 green marbles and 2 black marbles. what is the probability of a red marble being pulled from the bag and without replacing it , the pulling a green marble out ?

Answer 1

1/6

Explanation:

P (red)

• No. of red / Total
• 3 / 3 + 4 + 2
• 3/9
• 1/3

P (green without replacing red)

• No. of green / Total - 1
• 4 / 9 - 1
• 4/8
• 1/2

P (final)

• P (red) × P (green without replacing red)
• 1/3 × 1/2
• 1/6