A bag contains 3 red marbles, 7 blue marbles and 5 green marbles. If three marbles are drawn out of the bag, what is the probabi
lity that all three marbles drawn will be green?
2 answers:
Answer:
1/3
Step-by-step explanation:
since the total number of marbles are 3+7+5=15
and the number of green marbles=5
so probability of three marbles drawn being green=5/15=1/3
Answer:
6/91
Step-by-step explanation:
P(all are green)= P(GGG)
P(G)×P(G)×P(G)
5/15 × 4/14 × 3/13 = 6/91
NOTE: the total marbles in the bag decreased as the green marbles were picked
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