1. In a box there are 20 parts, 3 of which are defective. You draw parts from the box one after another without replacement and test them to find the defective ones. Find the probability of the following: (ay served any defective parts. You have drawn and tested 10 parts and you have not ob- (b) defective parts. Within the 10 parts drawn/tested, you have observed 2 (c) (On the 10th draw/test, you observe the third defective part.

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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.