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9 April, 18:59

A container has 1 pink block and 3 green blocks. Juan wants to make the probability of randomly selecting a black block equal to 50%. How many black blocks should he add?

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  1. 9 April, 20:51
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    4

    Step-by-step explanation:

    He should add 4 black blocks because there are a total of 4 other blocks, and in order to have a probability of 50%, the number of black blocks needs to be equal to the total number of the other colored blocks.
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