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mart [117]
3 years ago
8

A bag contains 10 marbles: 2 are green, 4 are red, and 4 are blue. Tammy chooses a marble at random, and without putting it back

, chooses another one at random. What is the probability that both marbles she chooses are blue?
Mathematics
1 answer:
erastovalidia [21]3 years ago
8 0
There are 10 marbles, out of these 10 there are 4.

The probability of her picking a blue marble is 4/10

This can be simplified to 2/5
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The error Sadie made is that she wrote a^7 as a^2 * a^5 instead of a^6 * a.

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The correct simplification is shown below:

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