ssume that utility bills (electricity, water and gas) for a certain city have normal distribution with mean of 165 per month and standard deviation of $44 per month. a) What is the probability that a randomly selected household in this city is paying less than $231 per month for utilities? Round to 4 decimal places. b) What is the probability that a randomly selected household in this city is paying between $134 and $231 er month for utilities? nswer = Round to 4 decimal places. =) What is the probability that a randomly selected household in this city is paying more than $134 per month for utilities? nswer= nswer = Round to 4 decimal places. d) What should be a utility bill of a household to be in the sixty-seventh percentile of utility bills in this ity?

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