Mathematics, 29.05.2020 04:59 myasiaspencer

The lifespans of certain batteries are normally distributed. It is found that 15% of battery/less than 30 hours and 10% of batteries last more than 50 hours. Find the mean and standard deviation of the lifespan of the batteries

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The lifespans of certain batteries are normally distributed. It is found that 15% of battery/less th...

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