इन ऑकड़ों का परिसर लिखें :
90, 97, 92, 95, 93, 95, 95, 85, 83, 77, 61, 63, 58, 56, 57, 54

The marks scored by 40 students of class IX in mathematics are given below: 81, 56, 68, 79, 85, 13, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54. Prepare a frequency distribution with class size of 10 marks.

The weights of 50 custard apples are given below . ( In grams ) 35 , 40 , 45 , 40 , 50 , 55 , 60 70 , 75 , 80 , 90 , 94 , 45 , 60 , 65 , 35 , 65 , 35 , 25 , 24 , 34 , 45 , 54 , 63 , 72 , 85 , 99 , 36 , 65 , 49 , 84 , 73 , 54 , 43 , 44 , 23 , 33 , 43 , 53 , 63 , 73 , 83 , 93 , 44 , 55 , 65 , 74 , 89 , 77 , 60 Construct a grouped frequency distribution table with classes 20 – 30 , 30 – 40 , ……………………………… 90 – 100 .

Two sections of class IX having 27 students in each section appeared for Mathematics olympiad. The marks obtained by them are shown below. 46, 31, 74, 68, 42, 54, 14, 61, 48, 37, 26, 8, 64, 57, 93, 72, 53, 59, 38, 16, 88, 56, 46, 66, 45, 61, 54, 27, 27, 44, 63, 58, 43, 81, 64, 36, 49, 50, 76, 38, 47, 77, 62, 53, 40, 71, 60, 45, 42, 34, 46, 40, 59, 42 One student is selected at random. Find the probability that selected student is having marks more than 49.

Find the mean, median and mode for the following distribution. 75, 62, 88, 55, 90, 95, 85, 59, 72, 78, 90, 95, 90, 95, 80, 71, 44, 57, 68, 90.

The maximum temperatures (in degrees celcius) and relative humidity (in percent) for Delhi for the month of August 1998, as reported by Meteorological department, are given below. Construct a frequency table for each. Maximum temperatures (in degree celcius) 32.5, 30.5, 33.8, 31.0, 28.6, 33.9, 31.4, 34.4, 35.6, 37.3, 37.5, 36.7, 37.0, 36.3 ,36.9, 36.7 Relative humidity (in percent) 90,97,92,95,93,95,93,85,83,85,83,77,83,77,74,60,71,65,74, 80,87,82,81,76,61,63,58,58,56,57,54