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Junior high school probability mathematics
(1) Xiaoming touches 4, and Xiaoying has 5 1 card left to touch.

1. Xiaoming won, and Xiaoying got less than 4, so she only got 2 and 3 of 4 colors, so ***4*2=8 possibilities.

Xiaoming's winning probability is 8/5 1

2. Xiaoying won, and the card Xiaoying touched was greater than 4, so four suits *** 10*4=40 possibilities.

Xiaoying's winning probability is 40/5 1

(2) Xiaoming touched the card 2, Xiaoying left 5 1 card touch.

1. Xiaoming won, Xiaoying got a card smaller than 2, and no card is smaller than 2, so the probability of Xiaoming winning is 0.

2. Xiaoying won, and the card Xiaoying touched was greater than 2, so four suits *** 12*4=48 possibilities.

Xiaoying's winning probability is 48/5 1

(3) Xiaoming touches card A, and Xiaoying has 5 1 card left to touch.

1. Xiaoming wins, Xiaoying's hand is smaller than A, so four suits *** 12*4=48 possibilities.

So Xiaoming's winning probability is 48/5 1.

2. Xiaoying won. Xiaoying touched a bigger card than A, and no card is bigger than A, so Xiaoying's chance of winning is 0.