Men draw lots to decide

Liang Liang is the first to draw lots, and the probability that he draws familiar content is: 20-4= 16 (← Liang Liang has familiar content 16) 16÷20× 100%=80%(← At this time, the possibility for him to take away unfamiliar content is: 20-( 165438 and two unfamiliar content tags) 2 ÷10x 100% = 20% (← unfamiliar content divided by the total number of tags multiplied by100%)