A box is filled with 5 brown cards, 4 red cards, and 5 green cards. A card is chosen at random from the box. What is the probability that it is a brown or a green card?
Write your answer as a fraction in simplest form.

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.