It takes perry 1 hour longer than david to mow the lawn. if it takes david h hours to mow the lawn, write an expression for the amount of time it takes perry to mow the lawn

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.