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Binomial Probability: Unfair coin flip

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11) Suppose an unfair coin comes up tails 42% of the time if it is flipped. If the coin is flipped 13 times, what is the probability that?

a) it comes up tails exactly 5 times.
b) it comes up tails less than 4 times.

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Solution Summary

The solution provides step-by-step method for the calculation of binomial probabilities. Formula for the calculation and Interpretations of the results are also included.

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