Probability - tickets

What is the probability when you have 25 tickets in 5000 that you not wins the first (one) prize?

Correct answer:

p =  99.5 %

Step-by-step explanation:

$p=100\cdot (1-25\mathrm{/}5000)={\displaystyle \frac{199}{2}}\mathrm{\%}=99.5\mathrm{\%}$

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Showing 1 comment:

Math student

hello there,

I would like to ask because is not so clear at least to me, why is not 1/200 and it is 199/200 the correct solution?

Regards
Katerina

1 year ago  Like

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