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2. An urn contains 4 balls numbered 1,2,3,4, respectively. Two balls are drawn without replacement. Let A be the event that t
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2P( )-Probability urtdrautng 2nd ball as Y ushen we knouw thed erst ball has i ont the draum is done att hou上冖replacement ba@ PL c)ニPs (a l is draum): Rr ( iSt ball 1 or 2nd ball 1) @w순): r Pende, Frcoubulbauerl) : 槃:固 P(C)

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