Probability - Basic Probability
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Simple
Total: 1 mark
A box contains 3 blue pens, 4 red pens and 8 green pens only.
A pen is chosen at random from the box.
Find the probability that this pen is green.
Answer
\[
\text{Total pens} = 3 + 4 + 8 = 15
\]
\[
\text{Number of green pens} = 8
\]
\[
P(\text{green}) = \frac{8}{15}
\]