Traditional Culture Encyclopedia - Hotel franchise - (2007? Nanchang) There is an equation written on the following three cards. Wash them with their backs up. Xiao Ming closed his eyes and drew a card randomly from them.

(2007? Nanchang) There is an equation written on the following three cards. Wash them with their backs up. Xiao Ming closed his eyes and drew a card randomly from them.

Tree diagram:

It can also be expressed in a table:? The first card

Algebraic expressions in Shanghai.

The second card?

Algebraic expression in the film? x？ x- 1？ 2? x -？ xx？ 1 ? x2？ x- 1？ xx？ 1 - x？ 12? ? 2 ? 2x？ 2x？ 1 -(4 points)

So p = 46 = 23.