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Una bolsa contiene 4 canicas azules, 4 canicas rojas y 4 canicas verdes. Sacas aleatoriamente una canica y luego otra (sin reemplazo). ¿Cuál es la probabilidad de que ambas canicas sean azules?
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Una bolsa contiene 4 canicas azules, 4 canicas rojas y 4 canicas verdes. Sacas aleatoriamente una canica y luego otra (sin reemplazo). ¿Cuál es la probabilidad de que ambas canicas sean azules?

User Pphanireddy
by
3.7k points

2 Answers

5 votes

Answer:

4/12

Explanation:

ya que ay 12 en total. y 4 canincas azules

User Mavelo
by
4.2k points
0 votes

Answer:

la probabilidad es 1/11

Explanation:

Hay 4+4+4 = 12 canicas en total en la bolsa.

Pues la posibilidad de sacar una canica azul en el principio es 4/12 o 1/3.

Y luego, no reemplaces la canica, y hay 11 canicas en total.

Por eso la posibilidad de sacar otra canica azul después es 3/11.

Son eventos independientes, y tenemos que multiplicarlos para tener la respuesta.

1/3 * 3/11 = 1/11

User WCC
by
3.4k points
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