A date in September is chosen at random. What is the probability of choosing an even number or a multiple of 5?

A50% increase followed by 33 1/2% decrease

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.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n