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A student who didn't study for the upcoming quiz decides to 'wing it' and just guess on the 10 question quiz. Every question is a True/False question. What is the pobability that he will pass the quiz with a grade of at least 70%? Please express your answer as a percent rounded to the hundredths decimal place. Include the '%' symbol.

Respuesta :

Answer:

There is around a 40% chance if I have done my calculations correctly

tramserran

Answer: 17.19%

Step-by-step explanation:

[tex]P=\dfrac{_{10}C_7 + _{10}C_8 + _{10}C_9 + _{10}C_{10}}{2^{10}}[/tex]

   [tex]= \dfrac{120+45+10+1}{1024}[/tex]

   [tex]= \dfrac{176}{1024}[/tex]

  = 0.171875

  = 17.1875%

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