Question

There were 5 questions in an examination. 10% students have done all questions and 10% of students don't do any questions. Rest 20% of students do only one question and 20% of students do 4 questions. If out of 15% of students do 2 questions and 400 students do 3 questions then how many students do all questions

Answer 1

Answer:

Step-by-step explanation:

Students answering 3 Questions = 400

Percentage who answered 3 Questions = 100% - Those who have either attempted more or less than 3 questions

= 100 - (10+10+20+20+15)

= 100 - 75

= 25%

25% = 400 students

1% = 400/25

1% = 16 Students

10% = 16*10

10% = 160 Students

Hence 160 Students have done all the questions