A certain standardized test's math scores have a bell-shaped distribution with a mean of 520 and a standard deviation of 119. Complete parts (a) through (c). (a) What percentage of standardized test scores is between 401 and 6397 D% (Round to one decimal place as needed.) (b) What percentage of standardized test scores is less than 401 or greater than 639? O% (Round to one decimal place as needed.) (c) What percentage of standardized test scores is greater than 758? O% (Round to one decimal place as needed.)
Percentage
A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.
Algebraic Expressions
In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.
Numbers
Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.
Subtraction
Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.
Addition
Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.
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