So, one needs just about 13.5 attempts to attain 50% chance of single success: http://www.wolframalpha.com/input/?i=0.5+%3D+1+-+%28.95+^+n%29 http://www.wolfra

So, one needs just about 13.5 attempts to attain 50% chance of single success: http://www.wolframalpha.com/input/?i=0.5+%3D+1+-+%28.95+^+n%29 http://www.wolframalpha.com/input/?i=0.5+%3D+1+-+%28.95+^+n%...