Should be C. 1/19. because if there's 20 maebles in the bag and without replacing the marble then it actually would be 2/18
Answer:
Use distributive property
Hey!
Explanation:
↓↓↓↓↓↓↓↓↓↓
First, remove parenthesis.

Secondly, multiple by the numbers.


Third, apply exponents rule.



Finally, refine.

<u><em>Answer⇒⇒⇒⇒28</em></u>
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-Charlie