Question

An urn contains 10 black and 5 white balls. Two balls are drawn from the urn one after the other without replacement. What is the probability that both drawn balls are black? ​

Answer 1

Answer:

Step-by-step explanation:

Solution

verified

Let B(i=1,2) denote the event of getting a back ball in the i  

th

 draw.

Required probability =P(B  

1

​

∩B  

2

​

)=P(B  

1

​

)P(B  

2

​

/B  

1

​

)

                                                             =  

15

10

​

×  

14

9

​

=  

7

3

​