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Glenn receives 6 birthday cards. If he is equally likely to read the cards in any order. What is the probablitiy that her reads the cards from his parents and his sister before he reads other cards

Sagot :

Answer:

1:2

Step-by-step explanation:

his parents + sister = 3 people

there fore the ratio is 3:6 but that can be simplified to 1:2 because 3:6 = .5