If 5 apples in a barrel of 25 apples are rotten, what is the expected number of rotten apples in a sample of 2 apples? A. 0.4 B. 1 C. 0.63 D. 0.33

Question

If 5 apples in a barrel of 25 apples are rotten, what is the expected number of rotten apples in a sample of 2 apples?  A. 0.4	  B. 1	  C. 0.63	  D. 0.33

anonymous · Answer

Divide 25 by 2, then divide 5 by the answer to that and you'll get the answer(:

hartnn · Answer

can u find the probability of rotten apples ?

hartnn · Answer

it will be 5/25 
so expected number is just multiplication of number of favorable events  and probab..
so here its 2* 5/ 25 = ?

anonymous · Answer

Since the sample is 2 apples, divide 25 by 2 and you'll get 12.5. Then just divide 5 by 12.5 and you'll get the answer (: