[Banana_Ghost]

pawn Code:

public OnPlayerDeath(playerid, killerid, reason)
{
    new str[128];
    new playername[MAX_PLAYER_NAME];
    new Float:oldscore = GetPlayerScore(killerid);
    GetPlayerName(playerid,playername,sizeof(playername));
    SetPlayerScore(killerid,GetPlayerScore(killerid)+random(25));
    new Float:newscore = GetPlayerScore(killerid);
    format(str,sizeof(str),"You Have Killed %s (%d) And Have Been Given %d Score. Total Score: %d",playername,playerid,newscore-oldscore,GetPlayerScore(killerid));
    SendClientMessage(killerid,-1,str);
    return 1;
}

Something like this?
I can't really tell you if this is correct as I have written this in my web browser and it's 9am.
But if it works, let me know.