एक प्रवेश परीक्षा में बैठाने वाले दो समूह के विद्यार्थियों की बहुलक आयु की तुलना कीजिए |
`{:( "आयु (वर्षो में )",16-18,18-20,20-22,22-24,24-26),("समूह अ:"," "50," "78," "46," "28," "23),(" समूह ब: "," "54," "89," "40," "25," "17):}`

Compare the modal ages of two groups of students appearing for an entrance test: Age (in years): 16-18 18-20 20-22 22-24 24-26 Group A: 50 78 46 28 23 Group B: 54 89 40 25 17

Given below are the number of students in 30 class rooms in a school. Construct a frequency distribution table for this data with a class interval of 4. {:(25" "30," "24" "18," "20" "24," "32" "35," "22" "20),(22" "32," "40" "28," "30" "25," "26" "29," "34" "15),(38" "28," "19" "16," "15" "20," "24" "30," "26" "18):}

The mean of the data 15, 20, 20, 16, 22, 17, 23, 18, 24, 25 is ________.

A study was made for the number of persons of different age groups visited in a library in a week which is shown in the histogram. Study the histogram and answer the questions given below. एक सप्ताह में एक पुस्तकालय में जाने वाले विभिन्न आयु समूहों के व्यक्तियों की संख्या के लिए एक अध्ययन किया गया था जो हिस्टोग्राम में दिखाया गया है। हिस्टोग्राम का अध्ययन करें और नीचे दिए गए प्रश्नों के उत्तर दें The ratio of the number of persons in the age groups 15-20 years and 20-25 years together, to the number of persons in the age group 30-35 years and 35-40 years together, is:

Tabulate , the given data by taking Class intervals : 1-10 , 11- 20 , 21- 30 , 31- 40 Data : 9 , 10 , 8 , 6 , 7 , 4 , 3 , 2, 16 , 28 , 22 , 36 , 24 , 18 , 27 , 35 , 19 , 29 , 23 , 34.

The marks of 15 students (out of 50) in an examination are 20, 22, 26, 31, 40, 19, 17, 19, 25, 29, 23, 17, 24, 21, 35 Find the median marks

If the s.d of-5, -4,-3, -2,-1, 0, 1, 2, 3, 4, 5 is sqrt(10) then find the standard deviation of 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25

A group of three friends,K, L and M, are sitting in a cafe. Their average age is 24 years. Another friend ‘N’ joins the group and the new average age of the group becomes 23 years.If another friend ‘R’, whose age is 2 years more than that of ‘N’, replace ‘K’, then the average age of L, M, N and R becomes 22.5 years. What is the age of K ? K, L और M,तीन दोस्तों का एक समूह एक कैफे में बैठा है। उनकी औसत आयु 24 वर्ष है। एक अन्य मित्र 'N' समूह में शामिल होता है और समूह की नई औसत आयु23 वर्ष हो जाती है। यदि कोई अन्य मित्र ‘R’, जिसकी आयु, ‘N’ से 2 वर्ष अधिक है,' K 'का स्थान ले लेगा, तो L, M, N और R की औसत आयु 22.5 वर्ष हो जाएगी। K की आयु क्या है?

{:(A , B , C , D , E , F , G , H , I , J , K , L , M , N , O , P , Q , R ,S , T ,U , V , W ,X , Y , Z), (1 ,2 , 3 , 4 ,5, 6 , 7,8,9,10 , 11 , 12, 13, 14, 15 , 16 , 17 , 18 , 19, 20 , 21 ,22 , 23 , 24 , 25 , 26):} B:16::D:?

{:(A , B , C , D , E , F , G , H , I , J , K , L , M , N , O , P , Q , R ,S , T ,U , V , W ,X , Y , Z), (1 ,2 , 3 , 4 ,5, 6 , 7,8,9,10 , 11 , 12, 13, 14, 15 , 16 , 17 , 18 , 19, 20 , 21 ,22 , 23 , 24 , 25 , 26):} KMF: LLH :: RMS: ?