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In a bag full of marbles, you have 4 white, 4 blue, and 2 black. Find the probability that you pull out a black marble put it back to then put out another black marble again. p(black and black)=​

Respuesta :

Answer:

P(black, then black) = (2/10)(2/10)

= (1/5)(1/5) = 1/25

Step-by-step explanation:

We start with 10 marbles, 2 of which are black. So P(black) = 2/10 = 1/5. Since this marble is put back, we still have the same 10 marbles. So P(black) = 2/10 = 1/5, and it follows that P(black, then black) = (1/5)² = 1/25.

Answer:

1/25

Step-by-step explanation:

P(Black Marble)=No of black marbles/Total No of marbles=2/10=1/5

When there is 'and' in probability, we multiply the probability of both events

So, P(Black and Black)=1/5×1/5=1/25