Denise is trying to open a safe whose combination she does not know. IF the safe has 5000 possible combinations,and she can try 50 different possibilities,what is the probability that she does not pick the one correct combination.  Pick.
A) 0.08  B) 159/160  C) 157/160  D) 3/160  E) 0.99
If Denise does not pick the correct combination in first 50 try, then the correct combination is one of remaining 4950. So Probability = 4950/5000= 
<gadget id="calculator">4950/5000</gadget>
<output>99/100 = around 0.99</output>
0.99   answer is 0.99
<result>E</result>
Denise is trying to open a safe whose combination she does not know. IF the safe has 5000 possible combinations,and she can try 50 different possibilities,what is the probability that she does not pick the one correct combination.