Respuesta :

Answer:

Step-by-step explanation:

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Answer:

.8 = P (laura)    

Step-by-step explanation:

Sally passes is .7

both passing is .56

P(sally and laura passing) = P(sally) * P(laura)

                  .56                   = .7 *  P(laura)

Divide each side by .7

.56/.7 =            .7 *  P(laura)/ .7

.8 = P (laura)