Garcia is preparing for his football game. The following table shows a probability model for the number of rushing yards that he will have next game.
Number of rush yards| Probability
:-: | :-: |
$0-39$ | $\dfrac18$
$40-79$| $\dfrac14$
$80-119$ |$\dfrac12$
$120+$ |$\dfrac18$
**Is this a valid probability model?**
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