3. The number of suits sold per day at a department store is shown in the table, with the corresponding probabilities. Find the Mean u = E(x), Variance o and Standard deviation o of the distribution. Number of suits sold, x 19 20 0.2 21 22 23 Probability, P(X=x) 0.2 0.3 0.2 0.1
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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