1. An urn contains 4 red balls, 3 blue balls, 2 green balls and one black ball. (a) If two balls are selected without replacement. What is the probability that the first ball is red and the second ball is blue? (b) If two balls are selected without replacement. What is the probability that we get one red ball and one blue ball (in any order)? (c) If three balls are selected without replacement. What is the probability that all three balls are red?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.