Step-by-step explanation:
so, there are 14 people with 1 ticket each, and I have 2 tickets.
that means there are 16 tickets (14+2) in the raffle.
each ticket has therefore a winning probability of 1/16.
I have 2 tickets, so my winning probabilty is therefore
1/16 + 1/16 = 2/16 = 1/8