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Travka [436]
3 years ago
6

Helen has a box of marbles. Of the marbles are yellow. Of the marbles are red. The rest of the marbles are blue. Helen pulls one

marble out of the box at random, records its color, replaces it, and mixes up the marbles again. If she does this 200 times, how many blue marbles should she expect to pull out?
Mathematics
1 answer:
ira [324]3 years ago
4 0

Answer:

what are the numbers of the red and yellow marbles

Step-by-step explanation:

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When we have n possible outcomes of an event and all of them have the same probability of appearance, then in theory each possibility has a probability 1/n of being the result of the event.

In this case the event is choosing randomly a coin out of 2, so no matter what the biased coin is or the results we get when we toss it, the probability of choosing the biased coin is ½ = 0.5 or 50%.

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