# In a class consisting of 100 students 20 know English and 20 do not know Hindi and 10 know neither English nor Hindi...

+1 vote
1,109 views

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?

posted Oct 6, 2015
Share this puzzle

## 4 Answers

0 votes

Best answer

Lets Assume
No. of students know both English and Hindi = x

No. of students know English (only) = 20-x
No. of students know Hindi (only) = 80-x

Now
20-x + 80-x + x = 100 - 10
=> x = 10

So the number of students know both English and Hindi are 10

answer Oct 7, 2015
0 votes

English (E) = 20
Hindi (H) = 100 -20 =80
English+Hindi (EH)
100-H-E+(EH) = 10
100-80-20+EH =10
EH=10

answer Oct 7, 2015
0 votes

And the answer is 50 students

answer Oct 7, 2015
0 votes

40 english
50 hindi
10 neither hindi or english=100

answer Oct 7, 2015 by anonymous

Similar Puzzles
+2 votes

A dinner party is to be fixed for a group consisting of 100 persons. In this party, 50 person do not prefer Veg, 60 prefer Non-veg and 10 do not prefer either Non-veg or Veg.

How many people prefer both Veg and Non-veg?

+1 vote

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?

+1 vote

In a group of 28 junior high school students, 7 take English, 10 take Hindi, and 4 take both languages. The students taking both English and Hindi are not counted with the 7 taking English or the 10 taking Hindi. How many students are not taking either English or Hindi?

0 votes

A man has 20 coins, consisting of dimes (10 cents) and quarters (25 cents). If the dimes were quarters and the quarters were dimes, he would have 90 cents more than he has now. How many dimes and quarters does he have?

0 votes

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends. What is it?