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the mean gas mileage for hybrid car is 56 miles per gallon. suppose that the gasoline...

the mean gas mileage for hybrid car is 56 miles per gallon. suppose that the gasoline mileage is approximately normally distributed with a standard deviation of 3.3 miles per gallon a) what proportion of high risk it's over 62 miles per gallon b) what proportion of hybrids gets 50 miles per gallon or less c) what proportion of hybrids gets between 59 and 61 miles per gallon d) what is the probability that a randomly selected hybrid gets less than 45 per gallon

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