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A computer prints out three digits chosen at random from 0 to 9 inclusive. Find the probability that:
a) all three digits are different
b) the third digit differs from the first two digits
For (a) I went [tex]1/_9C_3 = 1/84[/tex]. I think it's wrong but I didn't know what else to try.
And for (b) I don't even know where to start.
a) all three digits are different
b) the third digit differs from the first two digits
For (a) I went [tex]1/_9C_3 = 1/84[/tex]. I think it's wrong but I didn't know what else to try.
And for (b) I don't even know where to start.