Question

a test was given to 30 students. 5/6 of the student gave all correct answer how many student did one or more than one mistake?​

Answer 1

Given that:

• A test was given to 30 students.
• 5/6 of the students gave all correct answer.

To Find:

• How many students did one or more than one mistake.

Let us assume:

• x students did one or more than one mistake.

Finding the value of x:

According to the question.

↠ 5/6 of 30 + x = 30

↠ 25 + x = 30

↠ x = 30 - 25

↠ x = 5

Hence,

• 5 students did one or more than one mistake.

Answer 2

Given :-

A test was given to 30 students. 5/6 of the student gave all correct answer

To Find :-

How many student did one or more than one mistake

Solution :-

5/6 gave all correct answer

Total student who gave at least one wrong answer

1 - 5/6

6 - 5/6

1/6

Now,

No. of students who make at least one mistake = 1/6 of 30

No. of students who make at least one mistake = 1/6 × 30

No. of students who make at least one mistake = 1 × 5

No. of students who make at least one mistake = 5