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Butoxors [25]
4 years ago
7

uma urna contem 7 bolas brancas, 5 bolas pretas e 4 bolas vermelhas. qual a probalidade de retirarmos, ao acaso, uma bola preta?

Mathematics
1 answer:
stepan [7]4 years ago
6 0

<span> </span> <span>A urna contém 16 bolas no total.  5 deles são pretas.

A probabilidade de retirarmos uma bola preta <span>é

               5 / 16  =  0.3125  =  31.25% .

</span></span>
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3 years ago
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3 years ago
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__________________

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5 0
1 year ago
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