Question

400 students appeared an examination. 81% of them passed. Find the number of students failed in
the examination.

Answer 1

Answer:

81/100×400

=342

400-342

=68.

The number of students failed in the exam is 68.

Step-by-step explanation:

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Answer 2

$\dag \: \: \pink{solution}$

No. of appeared students: 400 students.

Percentage of passed students: 81% students.

So,

Percentage of failed students:

$= (100 - 81)percent$

$= 19 \: percent$

Let the no. of students

failed: (x)

$19 \: percent \: of \: x = 190 \: percent$

$=> (19\10) \times x = 190$

$=> x = (190 \times 10)\19$

$=> x = 10 \times 10$

$=> \purple {x = 100} \pink{(ans)}$