At present, a lottery game is prevalent in small shops in some places. Vendors have prepared 200 lottery tickets numbered 1-200, of which 1-3 is the first prize, a small pistol worth 5 yuan, and 4-10 The second prize is a small toy worth 2 yuan, the 11th-20th prize is a stationery worth 1 yuan, other lottery tickets do not win the prize; every 0.5 yuan can be touched once. Please first calculate the possibility of winning the first, second and third prizes respectively, and then talk about your views on this kind of lottery and suggestions for students participating in the lottery.
目前一些地方的小店盛行一种摸奖游戏，商贩准备了编号为1-200号的摸奖券200张，其中1-3号为一等奖，奖价值5元的小手枪，4-10号为二等奖，奖价值2元的小玩具，11-20号为三等奖，奖价值1元的文具，其他奖券不中奖；每0.5元可以摸奖一次．请先分别算一算摸到一、二、三等奖的可能性，再说一说你对这种摸奖的看法及对参加摸奖同学的建议．
<gadget id="calculator">200 * 0.5</gadget>
<output>100</output>

<result>100</result>