My friend Harribo came into school one day and said all his plums had died when his granddad had brought them to St Pancras stat
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Answer:
is the required probability.
Step-by-step explanation:
Total number of Marbles = Blue + Red
Probability of getting blue
Probability of not getting a blue
To get exactly one blue in two draws, we either get a blue, not blue, or a not blue, blue.
<u>First Draw Blue, Second Draw Not Blue:</u>
1st Draw:
2nd Draw: (since we did not replace the first marble)
To get the probability of the event, since each draw is independent, we multiply both probabilities.
<u>First Draw Not Blue, Second Draw Not Blue:</u>
1st Draw:
2nd Draw: (since we did not replace the first marble)
To get the probability of the event, since each draw is independent, we multiply both probabilities.
To get the probability of exactly one blue, we add both of the events: