Question
An urn contains 6 red, 5 blue and 2 green marbles. If 2 marbles are picked at random, what is the probability that both are red?
Answer: Option B
P(Both are red),
$$\eqalign{
& = \frac{{^6{C_2}}}{{^{13}{C_2}}} \cr
& = \frac{5}{{26}} \cr} $$
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P(Both are red),
$$\eqalign{
& = \frac{{^6{C_2}}}{{^{13}{C_2}}} \cr
& = \frac{5}{{26}} \cr} $$
Was this answer helpful ?
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