Assume that you walk in a park, and there are 5 types of flowers in the park. You pick at random 1 flower every 5 min as you walk in the park. (a) How long does it take on average when you get all 5 types of flowers in the park? (b) What is the variance of the time you spend on walking? Hint: the time you spend in the park is 5 N5, where N, is the total number of flowers you pick until you have 5 different flowers.

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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.