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Might the mathematically gifted consider the following question which my daughter has to answer for an exam revision:
A biased coin is spun twice. The probability that it will come down heads both times is 00.36.
Calculate the probability that it will come downtails both times.
TIA
A biased coin is spun twice. The probability that it will come down heads both times is 00.36.
Calculate the probability that it will come downtails both times.
TIA
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heads 00.333333 tails 00.333333 heads/tails 00.333333
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=(1-(0.36^0.5))^2
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0.36 or 36% represents the probablility of a head squared so to work out the probability of a head calculate the square root of 0.36. This works out as 0.6 or 60%.
Therefore the probability of a tail is 0.4 or 40% and the probability of two tails is 0.4 squared which is 0.16 or 16%. |
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Thank you for your replies.
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