Lua Casino percent win

[PuzzeL]

Whats up, can someone give me rewrite this script so that the percentage chance of winning was smaller, it is best determined by me.
Thanks in advance.
/ translator explained

<?xml version="1.0" encoding="utf-8"?>
<mod name="Casino lever2" enabled="yes">
  <action uniqueid="5889" event="script"><![CDATA[
        local pos = {x=998, y=1022, z=7, stackpos = 255}
      
        local cash = 2160
        local t = {
            [{1, 55}] = 0,
            [{56, 90}] = 2,
            [{91, 100}] = 3
        }
        local a, b = getItemInfo(cash).name, getItemInfo(cash).plural

        function onUse(cid, item, fromPosition, itemEx, toPosition)
            local v = getThingfromPos(pos)
            if v.itemid ~= cash then
                return doCreatureSay(cid, 'Mozesz uzywac do gry tylko ' .. b .. '.', TALKTYPE_ORANGE_1, false, cid)
            end

            local r = math.random(100)
            for i, k in pairs(t) do
                if r >= i[1] and r <= i[2] then
                    doRemoveItem(v.uid)
                    if k < 1 then
                        doCreatureSay(cid, 'Straciles ' .. v.type .. ' ' .. (v.type == 1 and a or b) .. ' :(', TALKTYPE_ORANGE_1, false, cid)
                        doSendMagicEffect(pos, CONST_ME_POFF)
                    else
                        doCreatureSay(cid, 'Wygrales ' .. v.type * k .. ' ' .. (v.type == 1 and a or b) .. ' :)', TALKTYPE_ORANGE_1, false, cid)
                        doCreateItem(cash, v.type * k, pos)
                        doSendMagicEffect(pos, CONST_ME_MAGIC_RED)
                        doSendMagicEffect(toPosition, CONST_ME_SOUND_YELLOW)
                    end
                    return true
                end
            end
        end
    ]]></action>
</mod>

 

[Elime]

Right now you got 10% chanse to win 3x gold, 35% chanse to win 2x gold and 55% risk of losing.
You can increase the first interval to make it less likely to win.

For example:

local t = {
    [{1, 70}] = 0,
    [{71, 90}] = 2,
    [{91, 100}] = 3
}

This gives 10% chanse to win 3x gold, 20% chanse to win 2x gold and 70% risk of losing.

 

[PuzzeL]

Thank you!