Sagot :
Answer:
20
Step-by-step explanation:
Simplifying 18/24 would result to 3/4, because both numbers are multiples of 6 (six multiplied by three is eighteen, six multiplied by four is twenty-four.)
Doing that will lead you to the question, "What number can be multiplied by 3 and the product will be 15?"
The answer is 5.
So using 3:4 (or 3/4), we just have to multiply 5 and 4 to get the total number of items on the second test.
Answer:
The total number of items on the second test is 20.
Step-by-step explanation:
Given:
- Score on first test = 18
- Total items on first test = 24
- Ratio: 18/24 or 3/4
(Note: ratio can also be written as fraction)
- Score on second test = 15
- Total items of second test = x
Proportion equation:
3/4 = 15/x
Cross multiply: (the product of means is equal to the produc of extremes)
(3)(x) = (4)(15)
3x = 60
3x/3 = 60/3