A family’s utility costs are as follows:Electricity: $0.13 per kWhPropane gas: $2.30 per gallonTheir monthly usage fluctuates. Assume both are normally distributed with mean and standarddeviationsElectricity: μ = 850 kWh, σ = 100 kWhPropane gas: μ = 55 gallons, σ = 6 gallonsLet Y = the monthly utility cost
d) the probability that the monthly cost of electricity is greater than the monthly cost of propane gas
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