The following table gives the marks scored by 100 students in an entrance examination. Marks:  0-10    10-20  20-30  30-40  40-50  50-60  60-70  70-80 No. of Students (Frequency): 4  10  16  22  20  18  8  2 Represent this data in the form of a histogram.

The following table gives the marks scored by 378 students in an entrance examination : Marks 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 No. of Students 3 12 36 76 97 85 39 12 12 6 From this table form (i) less than series, and (ii) the more than series.

The following table shows the marks scored by 140 students in an examination of a certain paper: Marks: 0-10 10-20 20-30 30-40 40-50 No. of students: 20 24 40 36 20 Calculate the average marks by using the assumed mean deviation method.

Following table shows the marks scored by a group of 90 students in a mathematics test of 100 marks. Marks 0-20 20-30 30-40 40-50 50-60 60-70 70-100 No. of Students: 7 10 10 20 20 15 8 Find the probability that marks scored by a student in the class is: at most 60 marks (ii) at least 60 marks (iii)not more than 50 marks

Compute mean deviation from mean of the following distribution: Marks 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 No. of students 8 10 15 2 20 18 9 5

For the following data, draw a histogram and a frequency polygon: Marks: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 900-100 No. of Students 5 10 4 6 7 3 2 2 3 9

Find the mode of the following distribution: (i) Class-interval: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Frequency: 5 8 7 12 28 20 10 10

The marks scored by 750 students in an examination are given in the form of a frequency distribution table. Marks 600-640,640-680,680-720 and 720-760,760-800,800-840,840-880 No. of Students: 16 45 156 284 172 59 18 Represent this data in the form of a histogram and construct a frequency polygon.

Write the median class of the following distribution: Classes: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 Frequency: 4 4 8 10 12 8 4

The marks in science of 80 students of class X are given below: Find the mode of the marks obtained by the students in science. Marks: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 Frequency: 3 5 16 12 13 20 5 4 1 1

Write the median class for the following frequency distribution: Class-interval: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Frequency: 5 8 7 12 28 20 10 10