16
40 minus 28 = 12 were wrong
40 questions
65
10/40 wrong means 30/40 correct 30/40 = 75% correct
To achieve 80 percent on a 40-question test, you need to answer at least 32 questions correctly (80% of 40 is 32). This means you can only get 8 questions wrong (40 - 32 = 8). Therefore, to score 80 percent, you can afford to miss a maximum of 8 questions.
10 can be wrong and 30 right; 30/40 = 75%
A test score of "90" represents the percentage of correct questions. Multiply this percentage by the total number of questions and you will have the number of questions correctly answered. Subtract this from the total to find answers wrong. 90% of 40 questions = .90 x 40 = 36 questions right. 40-36 = 4 answers wrong.
35%
You need to get 40*60/100 = 24 correct, so you can get 40-24 = 16 wrong.
The question is, "What is 30% of 40?"is/of=%/100P/40=30/100100P=1200P=12You can miss 12 and get a 70% of the test.
40 minus 28 = 12 were wrong
40% were wrong.
You get 2/5 (40%) incorrect.
40 questions
You would have a 31 out of 40, or 77.5%
65
10/40 wrong means 30/40 correct 30/40 = 75% correct