Problema Solution
A bag contains 7 lavender marbles, 11 turquoise marbles and 5 rainbow marbles. What is the chance of drawing a lavender marble? If a lavender marble is drawn then placed back into the bag, and a second marble is drawn, what is the probability of drawing a turquoise marble? Give solutions exactly in reduced fraction form, separated by a comma.
Answer provided by our tutors
Part 1.
No. of rainbow marbles: 5
Total marbles = 7+11+5 = 23
Chance of getting rainbow marbles = 5/23
Part 2.
No. of lavender marbles: 7
Total marbles = 23 (the rainbow marble is placed back into back, therefore same total)
Chance of getting lavender marbles = 7/23