A bag contains 2 blue, 5 yellow, and 1 black tile. What is the probability of drawing a blue tile followed by a black tile if the first til drawn is not replaced.
A.1/32
B.1/28
C.1/12
D.1/8

B.1/28

Step-by-step explanation:

The bag contains 2 blue, 5 yellow, and 1 black tile.

The total number of tiles in the bag is

n(S)=2+5+1

n(S)=8

The number of blue tiles in the bag is

n(B)=2

The number of black tile is

n(Bk)=1

The probability of choosing a blue tiles is

The probability of choosing a black tile without replacing the first tile is:

The probability of drawing a blue tile followed by a black tile if the first tile drawn is not replaced

$0.004 per gallon

Step-by-step explanation:

Given:

Service Fee= $22

Fixed rate per gallon= m

Water Consumed= 2256 gallons

Total bill charged= $31.02

Now by computing the equation we get

Substituting data we get

Rounding off above value we get

per gallon