We will be using the fact that , where is the probability that the first bulb works and is the probability that the second bulb works.
The probability that the first bulb works is . However, when we take one out (given that the first bulb works) we now have 19 working bulbs and 4 bad ones. This means that the probability that the second bulb works is .
Now, we can find our final probability:
Answer: A
Step-by-step explanation:
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The answer is 7 because 2 to 5 is 3 and -2 to 5 I 7
Answer:
you have to give an equation first to be able to answer that...
Step-by-step explanation: