Josie took a long multiple choice test. The ratio of the questions she got incorrect to the number of problems she got correct was 4:9. If there were 65 questions on the test, how many did Josie get incorrect

Answer:20 incorrect questions

Step-by-step explanation: using the ratio formula

Add up the correct n incorrect

4+9 = 13 is the total ratio

Incorrect answer ratio is 4

So to know the number of incorrect answer is

4/13 * number of questions on the test

4/13 * 65 = 20 incorrect answer