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joravar choudhary

· started a discussion

· 1 Months ago

lenthy method (Question: 382347.0 )

please give any short solution

Question:

In the class of 150 students, 40 passed in History and Geography, 40 in History and Sociology, 30 in Sociology and Geography, and 10 students passed in all the three subjects. No students have failed in all the 3 subjects. Find the total number of students who passed in History only, Geography only, and Sociology only.

Options:
A)

65

B)

70

C)

75

D)

60

Solution:

Ans: (d)

  

Arti

· commented

· 1 Months ago

As we know 10 students passed in All so 40 in GH ,30 in GS and 40 in HS , so 120 - 30 = 90 and 60 left for each subject
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