In a company, $35 \%$ of the employees drink coffee, $40 \%$ of the employees drink tea and $10 \%$ of the employees drink both and coffee. What \% of employees drink neither tea nor coffee?
(a)35
(b)25
(c)15
(d)40
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.