Answer:
56 problems
Step-by-step explanation:
So we already know that the answer is: 56. However, a good help is knowing how to obtain this answer from the data provided.
Tony's quiz had 80 questions
Tony correctly answered 70% of them.
We can always write a percentage amount as a ratio by dividing the amount by 100.
[tex]70\% = \frac{70}{100} = 0.7[/tex].
This means that for every 100 questions, tony will respond correctly 70.
So, if Toni did a questionnaire of n questions, the amount that will answer correctly is calculated by the following expression:
[tex]C = n*\frac{70}{100}[/tex]
If [tex]n = 80[/tex] then:
[tex]C = 80 * \frac{70}{100}\\\\C = 56[/tex]
