1/2 6/11 3/5 Now, Eva's bag contains 4 blue pens and 3 red pens. Eva pulls out a pen at random, replaces it in the bag, and then pulls out a second pen at random. If the first pen is blue, what is the probability the second pen is red? 3/7 1/2 4/7 2/3 Here's another question! If a=3, what * is the value of 7+5a ? 15 22.