296 pupils of a school opt for swimming and/or skating as a part of their extra-curricular activities. How many pupils opt for swimming only? (1) 198 pupils opt for both swimming and skating. (2) 51 pupils opt for skating only.   Statement (1) ALONE is sufficient, but statement (2) ALONE is not sufficient.   Statement (2) ALONE is sufficient, but statement (1) ALONE is not sufficient.   BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.   EACH statement ALONE is sufficient.   Statements (1) and (2) TOGETHER are NOT sufficient.   Hint Half-n-half Clue