In a class, except 18 all are above 50 years.15 are below 50 years of age. How many people are there Answers:	A) 30	B) 33	C) 36	D) can not be determined.	E) none of these.
As per given statements,   15 are below 50 years of age.   except 18 all are above 50 years. means 3 are of 50 years of age.   there is no information about no of students above 50 years of age.   so total no can not be determined. ANSWER:can not be determined.
<result>D</result>
In a class, except 18 all are above 50 years.15 are below 50 years of age. How many people are there