C. Sophia Thompson is 12 years old. Her
2 answers:
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Answer:
The probability is
Step-by-step explanation:
From the question we are told that
The number of green marbles is
The number of red marbles is
The number of red marbles is
Generally the total number of marbles is mathematically represented as
Generally total number of marbles that are not red is
=>
=>
The probability of the first ball not being red is mathematically represented as
=>
The probability of the second ball not being red is mathematically represented as
=> (the subtraction is because the marbles where selected without replacement )
=>
The probability that the first two balls is not red is mathematically represented as
=>
=>
The probability of the third ball being red is mathematically represented as
(the subtraction is because the marbles where selected without replacement )
=>
Generally the probability of the first two marble not being red and the third marble being red is mathematically represented as
=>