According to the given Venn diagram number of students who like to read books are.
13 + 12 + 44 + 7 = 76
Number of students who like to play sports are,
44 + 7 + 15 + 17 = 83
But the number of students who like both to read books and play sports are,
44 + 7 = 51
Hence the number of students who like to read books or play sports are,
76 + 83 – 51 = 108.
Here formula used is:
(No. of students Read books ⋃ no. of students play sports) ⋂ No of students read books or play sports