Math 7 grade 7
can anyone me answer these questions? soon as possible!
i need the answer either dependent or independent.
introduction to probability (independent vs. dependent) events
1. lily picks a marble at random puts it back and then picks another marble at random.
are these events dependent or independent?
2. tracy picks a card at random. without putting the first card back, she picks a second card at random.
are these events dependent or independent?

Abag of jelly beans contain 13 pink, green, 20 yellow, 10 black, 7 red, and 11 orange jelly beans. approximately what percent of the jelly beans are pink and yellow?

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.