Solution:
Given that,
Mr.jones has 12 exams in 2 hours
From given,
12 exams ⇒ 2 hours
At that rate how many hours would it take to grade 48 exams
Let "x" be the time taken for 48 exams
Therefore,
12 exams ⇒ 2 hours
48 exams ⇒ "x" hours
This forms a proportion and solve the sum by cross multiplying
[tex]12 \times x = 2 \times 48\\\\12x = 96\\\\x = \frac{96}{12}\\\\x = 8[/tex]
Thus it takes 8 hours to grade 48 exams
