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QUESTION
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 105.1 hours and a...
Duracell Ltd claim that the life of their batteries in motorised soft toys is approximately normally distributed with a mean of 105.1 hours and a standard deviation of 17.7 hours. The best 65% of batteries would last beyond how many hours? Answer correct to 2 decimal places.
