003概率中等数值题medium
Checkpoint-Exclusive Grid Routes
题目
A robot moves from (0,0) to (5,3) using 5 right steps and 3 up steps in random order. How many paths visit exactly one of the checkpoints A=(2,1) and B=(4,2)?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案
题目
A robot moves from (0,0) to (5,3) using 5 right steps and 3 up steps in random order. How many paths visit exactly one of the checkpoints A=(2,1) and B=(4,2)?
解题计时
0:00
提交作答时记录，用于后续平均用时统计。
你的答案