When average age of 20 members are 0, how many members greater than 0?
Choose the correct choice from the following:	A) 17	B) 19	C) 21	D) 24	E) 25
Average of 20 numbers = 0.   Sum of 20 numbers (0 x 20) = 0.   It is quite possible that 19 of these numbers may be positive and if their sum is a then 20th number is (-a)   Answer is 19 (19)
<result>B</result>
When average age of 20 members are 0, how many members greater than 0?