Question

7. A bag contains 4 blue, 5 red and 7 green balls. If 4 balls are drawn one by one with replacement, what is the probability that all are blue? 1 (a) [b] 16 (c) 256​

Answer 1

Step-by-step explanation:

Probability of drawing a blue ball=

4+5+7

4

=

16

4

=

4

1

∴Required probability=

4

1

×

4

1

×

4

1

×

4

1

×

4

1

=

256

1

.

Answer 2

Answer:(a)

Step by step explanation: