Question

A bag contains 6 white and 4 red balls if a person draws 2 bolls and receive rupees 10 and rupees 20 for a white and red balls respectively then his expected amount is

Answer 1

Step-by-step explanation:

the amounts are 20 ,30,40

Answer 2

Answer:

bag contains 6 white and 4 red balls.

A white ball drawn then Rs10

If red ball then Rs20

⇒ Expectation =2(n

1

P

1

+n

2

P

2

)

Here P

1

= Probability of getting a white ball

=

10

C

1

6

C

1

=0.6 n

1

=Rs10

Here P

2

= Probability of getting a red ball

=

10

C

1

4

C

1

=0.4 n

2

=Rs20

∴ Expectation =2[0.6×10+0.4×20]

=Rs28.

Hence, the answer is Rs.28.