An Examination Consisting of Ten True-Or-False Questions Was Taken by a Class

question 38

Multiple Choice

An examination consisting of ten true-or-false questions was taken by a class of 100 students. The probability distribution of the random variable X, where X denotes the number of questions answered correctly by a randomly chosen student, is represented by the accompanying histogram. The rectangle with base centered on the number 8 is missing. What should be the height of this rectangle? ​ ​

• A) 0.35
• B) 0.25
• C) 0.4
• D) 0.2

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Definitions:

Labor Deepening Technology

Refers to investments in technology that increase the productivity of each worker.

Standard Of Living

A measure of wealth, comfort, material goods, and necessities available to a person or community.

Necessities Of Life

Basic needs required for maintaining a healthy existence, such as food, water, shelter, and clothing.

Labor Productivity

The amount of goods and services produced per hour of labor, serving as an important indicator of economic efficiency and competitiveness.