Of 100 students 90 passed in Bangla, 85 in Mathematics and 80 in both subjects. How many students failed in both subjects?

Of 100 students 90 passed in Bangla, 85 in Mathematics and 80 in both subjects. How many students failed in both subjects?

a) 7
b) 5
c) 15
d) 10

From the Combined Bank Senior Officer October 2021 – Preliminary exam, question 84 of 108.

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