30 व्यक्तियों का बजन किलोग्राम में निमनलिखित है । आँकड़ों को सारणीबद्ध करें जबकि पहला वर्ग-अन्तराल 50-59 है (59 को छोड़कर) : 63,68, 54, 66, 63, 61, 70, 84, 67, 74, 67, 57, 55, 66, 71, 57, 59, 75, 88, 65, 64, 72, 79, 68, 63, 64, 73, 69, 74, 81

There are 68 students of 9th standard from Model High school, Nandpur. They have scored following marks out of 80, in written exam of mathematics.70, 50, 60, 66, 45, 46, 38, 30, 40, 47, 56,68, 80, 79, 39, 43, 57, 61, 51, 32, 42, 43,75, 43, 36, 37, 61, 71, 32, 40, 45, 32, 36,42, 43, 55, 56, 62, 66, 72, 73, 78, 36, 46,47, 52, 68, 78, 80, 49, 59, 69, 65, 35, 46,56, 57, 60, 36, 37, 45, 42, 70, 37, 45, 66,56, 47 By taking classes 30-40, 40-50, less than type cumulative frequency table. Using the table, answer the following questions How manystudents, have scored marks less than 80?

There are 68 students of 9th standard from Model High school, Nandpur. They have scored following marks out of 80, in written exam of mathematics.70, 50, 60, 66, 45, 46, 38, 30, 40, 47, 56,68, 80, 79, 39, 43, 57, 61, 51, 32, 42, 43,75, 43, 36, 37, 61, 71, 32, 40, 45, 32, 36,42, 43, 55, 56, 62, 66, 72, 73, 78, 36, 46,47, 52, 68, 78, 80, 49, 59, 69, 65, 35, 46,56, 57, 60, 36, 37, 45, 42, 70, 37, 45, 66,56, 47 By taking classes 30-40, 40-50, less than type cumulative frequency table. Using the table, answer the following questions How manystudents, have scored marks less than 60?

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.

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 .

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.