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

question 120

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) 0.3
• B) 0.35
• C) 0.45
• D) 0.5

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Definitions:

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Crop Command

A feature in image editing and word processing software that allows users to remove outer parts of an image or page, focusing on the desired area.

Fly In Animation

A visual effect in presentation and video software where an object appears to move into its final position from off-screen, giving the impression of "flying in."

Duration

The amount of time that something lasts or continues, often used in reference to events, effects, or the terms of agreements.