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> 某街道分布如图,一个居民要从A处前往B处.如果规定只能走从左到右或从上到下的方向,那么该居民可选择的不同路线的条数是______.-数学
某街道分布如图,一个居民要从A处前往B处.如果规定只能走从左到右或从上到下的方向,那么该居民可选择的不同路线的条数是______.-数学
题目简介
某街道分布如图,一个居民要从A处前往B处.如果规定只能走从左到右或从上到下的方向,那么该居民可选择的不同路线的条数是______.-数学
题目详情
某街道分布如图,一个居民要从A处前往B处.如果规定只能走从左到右或从上到下的方向,那么该居民可选择的不同路线的条数是______.
题型:填空题
难度:中档
来源:不详
答案
从A点开始经过E点到达B处可选择的不同路径有5条,
从A点开始经过D点到达B处可选择的不同路径有9条,
从A点开始经过C点到达B处可选择的不同路径有13条,
从A点开始经过F点到达B处可选择的不同路径有13条,
共有40条不同路径,
故答案为40.
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题目简介
某街道分布如图,一个居民要从A处前往B处.如果规定只能走从左到右或从上到下的方向,那么该居民可选择的不同路线的条数是______.-数学
题目详情
答案
从A点开始经过D点到达B处可选择的不同路径有9条,
从A点开始经过C点到达B处可选择的不同路径有13条,
从A点开始经过F点到达B处可选择的不同路径有13条,
共有40条不同路径,
故答案为40.