There are 10 marbles in a bag. Four are blue, 3 are black and 2 white and 1 red. If the marbles are not replaced once they are drawn, find P(black and then white) *

Given:

Given that there are 10 marbles in a bag. 4 are blue, 3 are black, 2 are white and 1 is red.

The marbles are selected by not replacing the drawn ones.

We need to the probability of selected a black marble and then a white marble without replacement.

Probability:

Let B denote the black marble.

Let W denote the white marble.

The probability of selecting a black marble is

The probability of selecting a white marble without replacement is

The probability of selecting a black marble and then a white marble without replacement is given by

Substituting the values, we get;

Thus, the probability of selecting a black marble and then a white marble without replacement is

hi! i think the answer is 1/2 : )

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm