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The diagram below shows the contents of a jar from which you select marbles at random.
An illustration of a jar of marbles is shown. Four of the marbles are labeled with an upper R, seven of the marbles are labeled with an upper B, and five of the marbles are labeled with an upper G. The key identifies upper R to represent red marbles, upper B to represent blue marbles, and upper G to represent green marbles.
3 answers
Unfortunately, it seems that the question is missing. Please provide me with the question so I can assist you in a better way.
the question is: what is the probability of selecting a red marble then another red marble
There are 16 marbles in the jar, 4 of which are red.
The probability of selecting a red marble on the first draw is therefore 4/16 or 1/4.
Assuming the first marble is not replaced, there are now 15 marbles in the jar, 3 of which are red.
The probability of selecting a red marble again on the second draw is therefore 3/15 or 1/5.
To find the probability of both events occurring, you multiply the probabilities together:
1/4 x 1/5 = 1/20
Therefore, the probability of selecting a red marble followed by another red marble is 1/20.
The probability of selecting a red marble on the first draw is therefore 4/16 or 1/4.
Assuming the first marble is not replaced, there are now 15 marbles in the jar, 3 of which are red.
The probability of selecting a red marble again on the second draw is therefore 3/15 or 1/5.
To find the probability of both events occurring, you multiply the probabilities together:
1/4 x 1/5 = 1/20
Therefore, the probability of selecting a red marble followed by another red marble is 1/20.