Respuesta :

Answer:

Step-by-step explanation:

total =20

red=10

P(red)=10/20=1/2

Answer:   1/4

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Explanation:

We have 10 red blocks out of 40 total (since 20+10+5+5 = 40)

The chances of picking red are 10/40 = 1/4

1/4 = 0.25 = 25%