2007 AMC 8 Problems/Problem 24: Difference between revisions
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==Solution== | ==Solution== | ||
The combination of digits that give multiples of 3 are (1,2,3) and (2,3,4). The number of ways to choose three digits out of four is 4. Therefore, the probability is <math>\textbf{(C)}\ \frac{1}{2}</math>. | The combination of digits that give multiples of 3 are (1,2,3) and (2,3,4). The number of ways to choose three digits out of four is 4. Therefore, the probability is <math>\textbf{(C)}\ \frac{1}{2}</math>. | ||
==See Also== | |||
{{AMC8 box|year=2008|num-b=23|num-a=25}} | |||
Revision as of 22:49, 9 December 2012
Problem
A bag contains four pieces of paper, each labeled with one of the digits 
, 
, 
or 
, with no repeats. Three of these pieces are drawn, one at a time without replacement, to construct a three-digit number. What is the probability that the three-digit number is a multiple of ?
Solution
The combination of digits that give multiples of 3 are (1,2,3) and (2,3,4). The number of ways to choose three digits out of four is 4. Therefore, the probability is 
.
See Also
| 2008 AMC 8 (Problems • Answer Key • Resources) | ||
| Preceded by Problem 23 |
Followed by Problem 25 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AJHSME/AMC 8 Problems and Solutions | ||
