  # In a class of 20 students in an examination in Mathematics 2 students scored 100 Marks each, 3 get zero each...

+1 vote
1,408 views

In a class of 20 students in an examination in Mathematics 2 students scored 100 Marks each, 3 get zero each and the average of the rest was 40.

What is the average Of the whole class? posted Mar 9, 2016

+1 vote

(2*100)+(3*0)+15*40=800/20=40
Ans:Avg of whole class is 40 answer Mar 9, 2016
–1 vote

(2x100)+(3x0)+(15x40) =800
800/20=40 ans answer Mar 10, 2016
–1 vote

2 students get 100 marks, then 2* 100 = 200
3 students get 0 marks , then 3* 0 = 0
15 students get 40 (average) marks, then 15 * 40 = 600
Solution : (200 + 0 + 600) / 20 = 40 answer Mar 10, 2016 by anonymous

Similar Puzzles
+1 vote

In a class consisting of 100 students 20 know English and 20 do not know Hindi and 10 know neither English nor Hindi. How many students know both Hindi and English?

Roshan has solved 245 questions in an examination.
If he got only '0' marks, then how many questions were wrong when one mark is given for each one correct answer and 2/3 mark is subtracted on each wrong answer.

A tutor has 7 students. She is planning to distribute an equal amount of chocolate bars to each of her students that get an A on their exam. And after distributing the candy bars to students, she does not want to have any left over. At least how many chocolate bars must she have on hand?

The average of the marks of maths test of 20 students is 9.
If the marks of 5 new students are 9,5,3,2,1.
What is the new average marks?