Find the probability that 2 or more of the households
In a certain large population, 40% of the households have a total annual income of $70,000. An SRS of 4 of these households is selected. Find the probability that 2 or more of the households in the survey have an annual income of over $70,000.
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If your home requires one million Btu of heat energy from the furnace on a cold winter day, what is the cost in dollars to heat the house with natural gas, assuming a 60% furnace efficiency?
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