Question

i want proper explanation Q.No: 15​

Answer 1

Hey there!

Answer:

13/15

Step-by-step explanation:

P (No defective) = (8/10) * (7/9) * (6/8) * (5/7) = 1/3

P (1st def.) = (2/10) * (8/9) * (7/8) * (6/7) = 2/15

P (2nd def.) = (8/10) * (2/9) * (7/8)  *(6/7) = 2/15

P (3rd def.) = (8/10) * (7/9) * (2/8) * (6/7) = 2/15

P (4th def.) = (8/10) * (7/9) * (6/8) * (2/7) = 2/15

Now,

P (not more than 1 defective) = P (No defective) + P (one)

                                               = P (no defective) +  P ( 1st def.) + P (2nd def.) + P (3rd def.) + P (4th def.)

                                              = 1/3 + (2/15 + 2/15 + 2/15 + 2/15)

                                              = 1/3 + 4 * 2/15

                                              = 13/15

Hope It Helps You!