A friend comes into your office and you notice that he looks a little pale and sweaty. Your friend sits down and starts to tell
1 answer:
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Answer:
1,800,000,000 ways
Explanation:
Given
Required
Number of ways of selection
From the 8 digits; the first must be nonzero (i.e. any of 1 - 9).
There are 9 ways of selecting this:
The other 7 digits could be any of the 10 digits and there may be repetition.
Each of the digits can be selected in 10 ways. So, the number of ways of selecting the 7 digits is:
<u>For the alphabets:</u>
The first can be selected from the letters while the second can be selected from the remaining
So, the number of ways the alphabets can be selected is:
<u>Total number of selection is:</u>