how to solve these problems

Given that a bag of M & Ms has 21 brown candies, 15 orange candies, 10 yellow candies, 14 red candies, and 5 green candies, find the following probabilities. Enter all answers as reduced fraction. Do not use any spaces in your answers. 1. What is the probability that a red M & M is randomly chosen from the bag? P( R + 2. What is the probability that an orange M & M is randomly chosen from the bag? P( O 3. What is the probability of choosing a red M & M, putting it back, and then choosing a brown M & M? P( R and B + 4. What is the probability of randomly choosing a green or yellow M & M? P( Gory # )=