240662
17.09.2021 •
Mathematics
A box contains 19 green marbles and 19 white marbles. If the first marble chosen was a white marble, what is the probability of choosing, without replacement, another white marble? Express your answer as a fraction or a decimal number rounded to four decimal places.
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Ответ:
0.4865 or 18/37
Step-by-step explanation:
You first pick would have had the probability of 19/38.
Your second pick would have the probability of 18/37 if you do not put the first marble back.
Ответ:
Step-by-step explanation:
The equality must satisfy the following:
A total of 195 students and 10 adults with 40 students per bus at most.
If the students it can take is at most 40, we must consider the adults as well. This maximum excludes the adults so therefore the actual amount of students must be less the 40 to allow adults on the bus as well.
We can solve for n:
The number of buses need for this trip must great than 5.