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

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

Answer 2

Answer: 17.19%

Explanation:

`P=(_(10)C_7 + _(10)C_8 + _(10)C_9 + _(10)C_(10))/(2^(10))`

`= (120+45+10+1)/(1024)`

`= (176)/(1024)`

= 0.171875

= 17.1875%