kermit has been studying a maths unit the semester and is about to sit the final exam. in the exam marks are awarded as interges only.

?/100

the combines assessment mark gives an overall grade to the unit based on the following:

49% or less = fail

50%-59% = pass

60%-69% = credit

70%-79% = Distinction

80% or more = distinction

how many marks does kermit need in the exam to get a credit in the unit.

how did you determine the answer (using mathametics