Question

i want proper explanation Q. No: 9 the answer is c.137/220 if you don't know pls leave it​

Answer 1

Hey there!

Answer:

137 / 220

Step-by-step explanation:

For 1st bag:

5 white balls , 6 blue balls

Total balls = 11 balls

For 2nd Bag:

3 white balls, 7 blue balls

Total = 10 balls

Now,

P (ball is blue) =  P (1st bag.) + P (2nd bag)

                       = [{ 1/2 * (6C₁/11C₁)} + {1/2 * (7C₁/10C₁)}

                       = 1/2 ( 6/11   + 7/10)

                       = 1/2 { (6*10 + 7*11)/110}

                       = 1/2 {(60+77)/110}

                       = 137 / 220

Hope It Helps You!