Sk8terkaylee
30.06.2019 •
Mathematics
Abox contains 18 balls numbered 1 through 18. two balls are drawn in succession without replacement. if the second ball has the number 4 on it, what is the probability that the first ball had a smaller number on it? an even number on it?
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Ответ:
3 out of 18
i think
Step-by-step explanation:
Ответ:
Lets Reduce:
21/7=3 so we know for every 3 in 18/21 we have one in x/7
This means 6/7=18/21
Check:
18/6=3
21/7=3