At 15:00 there were 22 students in the computer lab. At 15:03 and every three minutes after that, 3 students entered the lab. If at 15:10 and every ten minutes after that 8 students left the lab, how many students were in the computer lab at 15:44 ?
Choose the correct answer.
A) 7  B) 14  C) 25  D) 27  E) 32
Initial no of students + 3 * (1 + No of possible 3 minute intervals between 15:03 and 15:44) -   8 *(1 + No of possible 10 minute intervals between 15:10 and 15:44)   20 + 3*14 -8 * 4 = 32   32
<result>E</result>
At 15:00 there were 22 students in the computer lab. At 15:03 and every three minutes after that, 3 students entered the lab. If at 15:10 and every ten minutes after that 8 students left the lab, how many students were in the computer lab at 15:44 ?