Question

4 rotten oranges are mixed accidently with 16 good oranges. Find the probability distribution of the number of rotten oranges in a draw of two oranges.

Answer 1

4 bad oranges are mixed with 16 good oranges The number of total oranges 

= 4 + 16 = 20 

2 bad oranges are to be choosen 

∴ Probability of choosing a bad orange 

= 4/20 = 1/5

∴ Probability of choosing one good orange

= 1 - 1/5 = 4/5

∵ X is the number of bad oranges