Preston Bought Gasoline for His Truck Four Times Last Month

question 368

Essay

Preston bought gasoline for his truck four times last month. He bought 74 litres at $1.25 per litre, 45 litres at $1.32 per litre, 88 litres at $1.28 per litre, and 20 litres at $1.39 per litre.
a. What simple average price per litre did Preston pay for gasoline last month?
b. What weighted average price per litre did Preston pay for gasoline last month? Round to the cent.
c. Which averaging method is the better reflection of Preston's gasoline cost last month? Why?

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Definitions:

Antagonistic Pleiotropy

A genetic phenomenon where one gene influences multiple traits in a way that is beneficial to one trait but detrimental to another.

S Allele

A specific version of a gene, often referring to those determining self-incompatibility in plants, which helps prevent self-fertilization and promotes genetic diversity.

Immunity

The ability of an organism to resist harmful microorganisms or viruses through the detection and response by the immune system.

Virulence

A measure of the severity of a pathogenic organism's effect on its host.