The following table gives production yield per hectare of wheat of 100 farms of a village: Production yield   50-55   55-60   60-65   65-70   70-75   75-80 in kg per hectare: No. of farms:            2          8         12         24         38        16 Draw ‘less than’ ogive and ‘more than’ ogive.

The following table gives production yield per hectare of wheat of 100 farms of a village. Change the distribution to a more than type distribution, and draw its ogive

The following table gives the production yield per hectare of wheat of 100 farms of a village. Change the given distribution to more than type distribution and draw its ogive

The following is the distribution of weights (in kg) of 50 persons: Weight (in kg) 50-55 55-60 60-65 65-70 70-75 75-80 80-85 85-90 No. of Person 12 8 5 4 5 7 6 3 Draw a histogram for the above data.

The following table gives the weekly wages of workers in a factory. Weekly wages(Rs) 50-55 55-60 60-65 65-70 70-75 75-80 80-85 85-90 No. of workers 5 20 10 10 9 6 12 18 Calculate the mean, by using Short Cut Method.

The distribution below gives the weight of 30 students in a class. Find the median weight of students: Weight (in kg): 40-45 45-50 50-55 55-60 60-65 65-70 70-75 No. of students: 2 3 8 6 6 3 2

Calculate the mean, median and standard deviation of the following distribution: Class interval 31-35 36-40 41-45 46-50 51-55 56-60 61-65 66-70 Frequency: 2 3 8 12 16 5 2 3

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 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.

Following frequency distribution given the weights of 38 students of a class: Weight in Kg: 31-35 36-40, 41-45, 46-50, 51-55, 56-60 61-65, 66-70 71-75 No. of students 9 5 14 3 1 2 2 1 1 Find the probability that weight of a student in the class is: (i)at most 60 kg (ii)at least 36 kg (iii)not more than 50kg. Also define two events in this context, one having probability 0 and the other having probability 1.

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