Ross can type a report in 4 minutes while Bev can type the same report in 7 minutes. How much time will it take them to type the report if they work together? answer with step by step solution pls :>​

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.