1个kaplan上的题目

tbs

During July, a mail order retailer receive 3300 orders for amounts of less than $100.and 1100 orders for amounts of at least$ 100.what was the average(arithmetic mean) size of an order in July?
1the gross sales from the orders less than $100 equaled the gross sales from the orders greater than $100
2 the orders from the orders greater than $100 amount for a total of $134000 om gross sales.

答案C,我觉得是E,因为没有说等于100的有多少,难道答案错了?

suse

同意E，不知道等于100的多少是不能求出答案