Concept:The total mark scored is the sum of each score multiplied by the number of students who got it.Explanation:For each score x, multiply it by its frequency f.0×4=01×3=32×7=143×8=244×6=245×2=10Add the results: 0+3+14+24+24+10=75.The frequency sum is also 30, which matches the number of students.Answer:The total mark scored is 75, so the correct option is D.