comparing the probability fallacy and the percentage fallacy.

What is the probability that you obtain 1 six given 4 trials of rolling a six-sided dice.

\frac{1}{6}+\frac{1}{6}+\frac{1}{6}+\frac{1}{6}?

correct answer: 1-(1-\frac{1}{6})^4.

What is the overall percentage discount of getting first an r% discounted followed by another s% discount?

r+s %?

correct answer: 100-(100-r)(100-s)%

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