Question

a machine dispensed red gumdrops into bags of various sizes. red gumdrops per bag stem | leaf 0 | 3 8 1 | 0 1 1 2 | 3 | 1 4 | 8 how many bags had at least 10 red gumdrops but less than 20 red gumdrops? □ bags submit

Explanation:

Step1: 确定范围对应的茎

至少10且小于20的数，茎为1（因为茎代表十位，1开头的数是10 - 19之间的数）。

Step2: 统计叶的数量

茎为1时，叶有0、1、1，共3个。

Answer:

3