Answer: 1/18
Step-by-step explanation:
9 total marbles
2 red
so the first time he picks it would be a 2/9 chance of the marble being red
the second time there would be 8 total marbles and 2 red, so it would be a 2/8 or 1/4 chance.
the probability is found by doing 2/9*1/4 which equals 2/36 or 1/18.
Once again similar traingles.
With same ratioes as before.
RS/RT = RV/RU=SV/TU = 1/2
Answer:
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Step-by-step explanation:
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