To succeed in a competition, Jermilin requires an average score of...

Given: Jermilin's scores in the first three exams: 78, 74, 70 The average score required in all four exams: 75 Let x be the score Jermilin needs to get in the fourth exam to achieve an average score of 75. Formula: Average score $=$ (sum of all scores) $/$ (number of scores) Calculation: We can use this formula to solve for x : $75=(78+74+70+x) / 4$ Multiplying both sides by 4 : $300=222+x$ Subtracting 222 from both sides: $x=78$ Therefore, Jermilin needs to score 78 in the fourth exam to achieve an average score of 75 in all four exams. (\therefore) Option 4 is the correct answer.