RRB NTPC · Question 38
The following questions are based on the information given below: In a school of 4000 students, 3000 know English, 2000 know French and 500 know Hindi, 1500 know French and English, 300 know French and Hindi, 200 know English and Hindi and 50 know all the three languages. How many know at least one language? A. 3550 B. 3000 C. 1850 D. 3500
Show answer & explanation
Answer: (A) A
Explanation
By inclusion–exclusion: 3000 + 2000 + 500 − 1500 − 300 − 200 + 50 = 3550 students know at least one of the three languages.