There are 25 squares in the picture.If you put 5 coins in th

There are 25 squares in the picture.If you put 5 coins in the square and three can be only one in each line and column,how many ways can you put the coins?就是第2句不太明白关键就是那个three如果按题意做(three)就太简单了也不符合平常做的常理