Question

A bag contains 10 oranges and 20 apples out of which 5 apples and 3 oranges are defective .If a person takes out two at random, what is the probability that either both are good or both are apples ?

Answer 1

Answer:

Step-by-step explanation:

Let probability of selecting two oranges be P(A) ,

P(A) = 20/30 x 19/30 = 19/45

Let probability of selecting two two non-defective item be P(B),

P(B) = 22/30 x 21/30 = 77/150.

P( A OR B) = P(A) + P (B)

= 19/45 + 77/150 = 421/450 = 0.0.93555556.