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π
e
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\(\div\)
\(\sqrt{\,}\)
\(a^{b}\)
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\(\frac{a}{b}\)
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Imagine a bag containing 100 marbles, of which 10 are red (R) and the rest are blue (B). A marble is randomly drawn from the bag.
Let \(R\) be the event of drawing a red marble.
Choose the correct probability tree diagram:
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