Mathematic Quiz 6

Question:

A bag contains 8 red balls, 9 purple balls, and 10 white balls. If two balls are drawn at the same moment, then find the probability that :

a. two balls drawn are different colors
b. two balls drawn are same colors
(Note : Probability)

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Mathematic Quiz 5
Answer :
a. 833
b. 6247500
Please click here for details.
Right answer : Erna Rahayu (XII IA1)
Wrong answer : Siti Fatimah (XII IA1)