20 points
#3 Type your answer NUMBER ONLY. Do not include units (red marbles) *
3. 7.SP.3.6
A bag contains 100 marbles, some red and
some purple. Suppose a student, without
looking, chooses a marble out of the bag,
records the color, and then places that
marble back in the bag. The student has
recorded 9 red marbles and 11 purple
marbles. Using these results, predict the
number of red marbles in the bag.
Your answer