SOLUTION: a box contains 25 transistors 6 of which are defective. if 6 are selected at random find the probability that b) none are defective the answer is .153% but i dont know how to ge

Algebra ->  Probability-and-statistics -> SOLUTION: a box contains 25 transistors 6 of which are defective. if 6 are selected at random find the probability that b) none are defective the answer is .153% but i dont know how to ge      Log On


   

Question 368867: a box contains 25 transistors 6 of which are defective. if 6 are selected at random find the probability that b) none are defective
the answer is .153% but i dont know how to get it
Found 2 solutions by Fombitz, scott8148:
Answer by Fombitz(32388) About Me  (Show Source):
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
ways of selecting 6 transistors from 25 ___ 25C6

ways of selecting 6 good transistors from 19 ___ 19C6

probability of selecting 6 good transistors ___ [19C6] / [25C6]