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Mathematics 7 Online
OpenStudy (anonymous):

A bag contains 10 counters. Four of the counters are red. In an experiment, three counters are take from the bag at random and put in a box. a) Caluculate the probability that there are exactly 2 red counters in the box. b) The same experiment is carried out 600 times. How many times would you expect there to be at least two red counters in the box?

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