Compute the missing frequencies f1 and f2 in the following data if the mean is 166926 and the sum of the frequency is 52 .
Construct a histogram from the following distribution of total marks obtained by 65 students of X class in the final examination
Marks(mid−points):150160170180190200No. of students810251273
If the median of the following data is 166.79, then the mean and mode are