Question 286204
Each question on the test will count for {{{1/68}}} of 80% of your grade
{{{1/68 = .014706}}}
{{{.014706*80 = 1.176}}} (in percent)
88.9% of the remaining 20% of your grade is {{{.889*20 = 17.78}}} (in percent)
Let {{{n}}} = number of questions you must answer CORRECTLY to
get a grade of 80% from the course
{{{1.176n + 17.78 = 80}}}
{{{1.176n = 80 - 17.78}}}
{{{1.176n = 62.22}}}
{{{n = 52.91}}}, or 53 out of 68, so you can miss 15 questions