In a class of 40 students, 18 passed mathematics, 19 passed accounts, 16 passed economics,...

In a class of 40 students, 18 passed mathematics, 19 passed accounts, 16 passed economics, 5 mathematics and accounts only, 6 mathematics only, 9 accounts only, 2 accounts and economics only. If each student offered at least one of the subjects,
a) how many students failed in all the subjects?
b) find the percentage number who failed in at least one of economics and mathematics.
c) calculate the probability that a student selected at random failed in account?

In Mathematics
2 Answers Available
Asked by Ogbpaulo on 18th April, 2018