There are 4 green marbles, 6 blue marbles, and 2 yellow marbles in a jar. One marble is randomly drawn
and replaced before second marble & drawn is the probability of drawing a blue marble and then
a yellow marble?

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

How do you solve a question like this?

Add the fractions and simplify 1/2+ 1/3