Conor has a bag of marbles. He counts out 10 marbles and finds that there are 3 blue marbles among them. If the bag has 600 marbles, predict how many will be blue.
If there are 3 blue marbles in a sample of 10 marbles, we can estimate that approximately 3/10 or 30% of the marbles in the bag are blue.
Therefore, we can predict that there will be around 30% of 600 marbles that are blue, which is 30% of 600 = 0.30 x 600 = 180 blue marbles.