单选题
After a store had sold k television sets for p dollars each，it reduced the price p of each set by 5 percent and then sold twice as many sets at this reduced price．
【正确答案】
B
【答案解析】一家商店以每台P美元售出k台电视后，把每台电视机的价格(P美元)降低了5%．然后以降低后价格卖出了2倍量的电视机。
比较的左项为卖出这些台电视机的总销售额：
pk+2kp(1-5%)=2.9pk
比较的左项为卖出这些台电视机的总销售额：
pk+2kp(1-5%)=2.9pk