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A sewing basket contains several pieces of ribbon, each of which is either $$8$$ inches long or $$13$$ inches long. The total length of all of the pieces is $$100$$ inches.
Quantity A
The number of pieces of ribbon in the basket that are $$8$$ inches long
Quantity B
The number of pieces of ribbon in the basket that are $$13$$ inches long
A显示答案
· 相关考点
1.1.2 凑整
6.4.5 概率中的集合问题
以上解析由 考满分老师提供。
