The sum of two numbers is 11 and their difference is 5

Regular price 75$ discount 25%sale price?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Which of the following is an example of conditional probability