In a sample of 250 students travelling to campus, 190 use taxis. Of the taxi commuters, 130 travel more than 15km. Of those who do not use taxis, 40 travel less than 15km. Compile a contingency table and answer the following question. What is the probability that a student from the sample travels more than 15km to campus?

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.