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statistics questions PLEASE HELP?
A telephone number consists of seven digits, the first three representing the exchange.
How many different telephone numbers are possible within the 537 exchange?
Number of possible telephone numbers _________________
thanks
5 Answers
- 1 decade agoFavorite Answer
Given four numbers to choose from, none of the 10 digits out of bounds, the answer is 10^4.
- Anonymous1 decade ago
Well, if we refer exclusively to the 537 prefix, then we can, by definition of the question, rule out the first 3 digits entirely. This leaves us with 4 suffix digits with which to make a number. Assuming we may start from 0000 and move in the range to 9999, this gives us 10,000 possible telephone numbers. Hope this helps.
- TomVLv 71 decade ago
If there are no restrictions on the digits that can be used, there are 10000 numbers, from 537-0000 through 537-9999
- 1 decade ago
yup. above answer is correct. 10 to the power 4 (as you have four numbers left) so it's 10^4 = 10,000 possible combinations. :)
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