Concept:The median class is the class interval whose cumulative frequency first reaches or exceeds half the total frequency.Explanation:Read the frequencies of all class intervals from the histogram and add them to get the total frequency N.Find the median position using 2N.Start from the lowest class interval and add the frequencies cumulatively.The median class is the class where this cumulative frequency first becomes equal to or greater than 2N.From the histogram, this condition is satisfied in the class 50.5−60.5.Answer:B. 50.5−60.5
