Language Dilemma
Logic
Level
2
Suresh teaches a class where some students know English, some know Hindi, some know both languages, and some know neither.
- 40 students know English.
- 30 students know Hindi.
- 10 students don't know English.
- 20 students don't know Hindi.
How many students are there in his class?
Inspiration: A Lot of Pets
50
70
100
Not enough information
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
All the students can only either know or don't know. There are 40 who know English and 10 who don't know. 10+40=50. There are 30 who know Hindi and 20 who don't know, 30+20=50.
This, confirming that there are 50 students.