JJ中未解答的题？急啊

399.  The estimated amount in the price list rounded to 1$. How much is the sum of the estimated amounts within 6$ of the sum of the actual amounts in the list.
(1)    There are fewer than 11 amounts in the list.
(2)    Each estimated amounts is 5$

选 1

max delta between actual and estimated = 0.4999999999999999999999.... = 0.5

11*0.5 < 6