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

question 220

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) 0.15
• B) 0.3
• C) 0.25
• D) 0.1

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Definitions:

Block Delimited

Refers to sections of code bounded by opening and closing markers or characters, often used to define a scope in programming languages.

{ }

Curly braces are used in programming languages to define a block of code.

Return Statement

A statement in programming languages used to exit a function and optionally pass back a value to the caller.

Invocation

The act of calling a method or a function in a program.