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Among a student group 49% use Google Chrome, 20% Internet Explorer, 10% Firefox, 5% Mozilla, and the rest use Safari. What is the probability that you need to pick 7 students to find 2 students using Google Chrome

Respuesta :

thaovtp1407

Answer:

17.39%

Step-by-step explanation:

We can summary the question:

  • Probability of students using Google chrome= 0.49
  • Probability of students using other browsers = 0.51

So the probability that you need to pick 7 students to find 2 students using Google Chrome is:

P(G) = [tex]C^{7} _{2}[/tex] * ([tex]0.49^{2}[/tex])([tex]0.51^{7}[/tex]) = 21*0.2401*0.03 = 0.1739 = 17.39%