An urn contains five red balls and four white balls. A sample of two balls is selected at random from the urn. Find the probability that
(a) only red balls are selected.
(b) at least one white ball is selected.
An urn contains five red balls and four white balls. A sample of two balls is selected at random from the urn. Find the probability that
(a) only red balls are selected.
(b) at least one white ball is selected.
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