Q. It was found that in first year of computer science of 80 students 50 know Cobol, 55 know C, 46 know pascal. It was also known that 37 know C and cobol, 28 know C and pascal , 25 know pascal and cobol, 7 students know none of the languages. Find how many all the 3 languages?

(A) 10
(B) 12
(C) 35
(D) 9

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✅ Correct Answer: (B) 12

Published by Mr. Dubey ⭐ 104.82K Points at 17-Sep-2023 07:17 am in Discrete Structure (DS)

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