Some question: At 15:00 there were 21 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 ?\nOptions:\n(A) 7\n(B) 14\n(C) 25\n(D) 27\n(E) 30
Some stream of consciousness:
User
Initial no of students + 3 * (1 + No of possible 3 minute intervals between 15:03 and 15:44) -\n8 *(1 + No of possible 10 minute intervals between 15:10 and 15:44)\n20 + 3*14 -8 * 4 = 27 The answer: (D).
Assistant