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1 My electricity bills for the last three months have been $23, $32 and $64. What is the average monthly 

electricity bill over the three month period? Write an expression to calculate the mean, and use print() to view the result.

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2 In this exercise you're going to do some calculations for a tiler. Two parts of a floor need tiling. One part is 9 tiles wide by 7 tiles long, the other is 5 tiles wide by 7 tiles long. Tiles come in packages of 6.

1. How many tiles are needed?
2. You buy 17 packages of tiles containing 6 tiles each. How many tiles will be left over?

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3 Assign multiple variables at once

x, y, z = 3, 5, 4

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4 Booleans (bool), Comparison Operators and Logical Operators

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• 5 Write code to compare these densities. Is the population of San Francisco more dense than that of Rio de Janeiro? Print True if it is and False if not.
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Operator Syntax Description And 10 Or Not X and y The result will be true if both the operands are true, otherwise, it is false. X or y not x The result will be true if both or either of the operands is true. If both the operands are false, then the result is false. The result will be true when the operand is false. It basically inverts the boolean value of the operand.