Please help me solve this problem. I need to show my work and I'm not even sure where to start. Thanks in advance. A gum ball dispenser has 38 orange gum balls. 30 purple ones and 18 yellow ones. Using three quarters what is the probability that of the 3 gum balls obtained, exactly 1 will...

kind of a random question: What kind of damage is possible if your balls remain at a higher than normal temperature for too long. I often sit with my laptop directly on my lap for extended periods. I'm wearing clothes at the time but afterwards I can feel that my balls are pretty heated from...