Ski/snowboard shop has a markup rate of 50% find the selling price of the skis that cost a store owner the wholesale price of $300

How do you find principle and simple interest

Nine more than four times a number is the same as one less than twice the number. find the number?

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.