Concept:The man's remaining amount is his total monthly earnings minus all expenses. First, calculate the education cost as a percentage, add the food cost, and subtract from the total income.Explanation:Total monthly earnings = N3,500.Amount spent on children's education = 15% of 3,500.So, education cost = 10015×3500=N525.Additional amount spent on food = N1,950.Total amount spent = education cost + food cost.Total spent = N525+N1950=N2,475.Amount left = total earnings − total spent.Amount left = N3,500−N2,475=N1,025.Answer:The amount the man has left is N1,025, which is option B.