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That's not quite relevant as the number of tickets in a lottery isn't finite (I heard a figure that some 20,000 tickets per week pick 1,2,3,4,5,6).
I'm with @Drakien on this, the chance of an individual ticket winning is not affected by other tickets. How much you win may be.
If it were me I'd probably split the 100 tickets over 10 or 20 draws to spread it out rather than spunking it all on one single draw (and suffering the single anticlimax of not winning much). The National Lottery phone app allows easy checking for winning tickets by scanning the QR code on the ticket.
Greenbank
http://datagenetics.com/blog/october22016/index.html
Try that, haven't checked it that closely but when I read it first time it was relevant.