Alice Scored in the 45th Percentile Rank on an Exam

question 171

Multiple Choice

Alice scored in the 45th percentile rank on an exam. If 400 students took the exam, how many
Students scored lower than Alice?

• A)179
• B)181
• C)178
• D)180

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Definitions:

Hydrogen Sulfide

A toxic, flammable gas with the formula H2S, known for its foul odor of rotten eggs and used in the manufacture of chemicals.

Lewis Structure

A diagram that represents the bonds between atoms and the lone pairs of electrons in a compound.

Water

A chemical compound, H2O, essential for all known forms of life, characterized by its liquid state at room temperature and its ability to dissolve many substances.

Helium

Helium is a chemical element with symbol He and atomic number 2, known as the second lightest and second most abundant element in the observable universe, primarily used in cryogenics and as an inert gas shield in arc welding.