HKD1710 wrote:

At 7 o'clock how many people are on line to buy tickets at a theatre box office?

(1) People are getting on the line at the rate of 2 people per minute at 7 o'clock.

(2) People are buying tickets and leaving the line at the rate of 4 people every 2 minutes at 7 o'clock.

(1) People are getting on the line at the rate of 2 people per minute at 7 o'clock.We do not have any info about except rate which does not reflect anything

Insufficient

(2) People are buying tickets and leaving the line at the rate of 4 people every 2 minutes at 7 o'clock. 4 people per 2 minutes is same like 2 people in 1 minute. Same as above

Insufficient

Combine 1 & 2

Same info. No clear cut answer

Answer: E