Answer:
6.25%
Step-by-step explanation:
The probability of choosing A the first time is 25%
The probability of choosing B the second time reduces to 6.25% because the odds are reduced since you need 2 variables instead of 1
11 blue
2 green
7 brown
total is 20 card
7 out of that 20 are brown
so x out of 100% are brown
7/20=x/100 - cross multiply
700=20x
x=700/20
x=70/2
The answer is the second option.
To find the answer quickly, fist look at the signs associated with the terms. The is a negative sign with the B and C in the original equation, and the second option is the only one that follows that.
You use 6 as the C since that is a shared value when multiplying 2 and 3, so 1/2 becomes 2 and 1/3 becomes 3.
Area = (16 x 8) - (6 x 4 ) = 128 - 24 = 104 ft^2
