SOLUTION: A box contains 10 transistors , 4 of which were defective. If 4 are selected at random, find the probability that. A: All are defective B: None are defective

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Question 1006119: A box contains 10 transistors , 4 of which were defective. If 4 are selected at random, find the probability that.
A: All are defective
B: None are defective
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
All defective:
P=%284%2F10%29%284%2F10%29%284%2F10%29%284%2F10%29=256%2F10000=0.0256
.
.
.
None defective:
P=%286%2F10%29%286%2F10%29%286%2F10%29%286%2F10%29=1296%2F10000=0.1296