A locker combination has three nonzero digits, and digits cannot be repeated. If the first digit is odd, what is the probability
that the second digit is even?
a. 1/2B. 4/9C. 1/8D. 1/9
1 answer:
The locker key is a combination of 3 different digits from 9 numbers (1 to 9).
This contains 5 odd numbers and 4 even numbers.
If the first digit is odd, there are 4 even digits in the remaining 8 numbers.
The probability that the second digit is even is 
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