Statistics and probability

In a store there are products that have a VAT of 21%; others 10% and others 4%. The data are as follows (rounded to the nearest euro cent):

• Textbooks at 4%. 24 units were sold and VAT was charged at €16.62.

• Console games, at 21%. The VAT charged for this item is €240. The number of games sold has been 30.

• Make a table in which the following data appears:

  • The number of units sold of each of the products.

  • The average value of each of the products without VAT and with VAT.

  • The value of the global VAT.

  • The average VAT rate charged.

  • Calculate the probability that the next product sold in that store will be a textbook.