Question

kevin has a ratio of 2 wrong answers to 7 correct answers on his math test. If he got 6 questions ewrong then how many did he answr correctly

Answer 1

21 questions

Explanation:

Given

`Wrong : Right = 2:7`

Required

Determine the number of correct answers if he answered 6 wrongly

The required ratio can be represented as:

`Wrong : Right = 6 : X`

Where X represents number of right answers for 6 wrong answers.

Next, we equate both ratios:

`6:X = 2:7`

Convert to fraction

`(6)/(X) = (2)/(7)`

Cross Multiply

`X * 2 = 6 * 7`

`2X = 42`

Divide through by 2

`X = 21`

Hence, he answered 21 correctly