Question

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.

Answer 1

Answer:

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

Answer 2

Answer: 17.19%

Step-by-step explanation:

$P=\dfrac{_{10}C_7 + _{10}C_8 + _{10}C_9 + _{10}C_{10}}{2^{10}}$

   $= \dfrac{120+45+10+1}{1024}$

   $= \dfrac{176}{1024}$

  = 0.171875

  = 17.1875%