The table above shows the number of days worked by a certain sales representative in each of three months last year. If the number of sales calls that the representative made each month was proportional to the number of days worked in that month and if the representative made a total of 168 sales calls in the three months shown, how many sales calls did the representative make in August?
50
51
56
57
60
假设比例为n,20✖️n➕17✖️n➕19✖️等于168,求出n等于3
代入法,看选项哪一个是19的倍数即可
此想法错误哦,比例可以是任何一个,不一定能除尽.
登录 或 注册 后可以参加讨论