Rectangle is 5ft in length and 3 ft in height. What is the area of the rectangle

15

Step-by-step explanation:

to find the area multiply the length by height

in this case it’s 5ft and 3ft

5 • 3 = 15

A=15

You can approach this question in multiple ways, 2 of which are more obvious. 

Method 1). Add up the number of marbles which aren't white divide that by the total number of marbles. 
I.e. 8 + 14 + 10 = 32
32/48 = 2/3
[There are 48 marbles in total]

Method 2). Find the total number of marbles, divide the number of white marbles by the total (like method 1), then do 1 minus the answer. 
I.e. 16/48 = number of white marbles
1 - 16/48 = 2/3