Question

A box contains 10 screws out of which 3 are defective. two screws are drawn at random .find the probability that none of the two screws are defective using 1) sampling with replacement and 2) sampling without replacement

Answer 1

1. 0 if their is a replacement
2. 1/10
ok

Answer 2

Answer:

1) 49/100 2) 7/15

Step-by-step explanation:

1) (7/10)*(7/10) = 49/100

2) (7/10)*(6/9) = 7/15