probability of choosing a marble

aburchett

New member
Joined
Jan 19, 2011
Messages
48
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?

My work: (just need to know if it is correct)
7+11+5=23 marbles in all
7/23 of drawing a lavendar marble
11/23 of drawing a turquoise marble if a lavendar marble is drawn then placed back into the bag
 

pka

Elite Member
Joined
Jan 29, 2005
Messages
8,124
aburchett said:
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?
My work: (just need to know if it is correct)
7+11+5=23 marbles in all
7/23 of drawing a lavendar marble
11/23 of drawing a turquoise marble if a lavendar marble is drawn then placed back into the bag
Correct.
 
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