In an examination of final year students of a school, 60 offered history, 50 offered economics, and 48 literature. 30 offered history and economics 16 offered history and literature, 22 offered economics and literature. If 10 candidates offered all the 3 subjects find the number that offered: 1)

a) History only

b) Economics only

c) Literature only

2) How many candidates sat for the examination assuming that each candidate sat for at least one subject.

REPRESENT IN VENN DIAGRAM