CBSE 2022 | संख्याओं के साथ खेलना - L20 | Class 6 NCERT गणित | 7 PM | Kamal Sir

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

The ratio of the given two numbers is 9 : 7. If 6 is added to each number, then the ratio becomes 21 : 17. What is the difference between the given numbers ? दी गयी दो संख्याओं का अनुपात 9:7 है | यदि प्रत्येक संख्या में 6 जोड़कर उसे बढ़ा दिया जाए तो अनुपात 21:17 हो जाता है | दी गयी दो संख्याओं के बीच क्या अंतर है?

If a dairy mixes cow's milk which contains 10% fat with buffalo's milk which contains 20% fat,then the resulting mixture has fat (120/7)% of fat. What ratio was the cow's milk mixed with buffalo's milk? कोई डेयरी गाय का दूध जिसमें वसा (फैट) का प्रतिशत 10% है, को भैंस के दूध के साथ मिलाती है जिसमें 20% बसा है तो परिणामी मिश्रण में वसा का (120/7)% होता है। गाय का दूध किस अनुपात में भैंस के दूध के साथ मिलाया गया?

The marks obtained by 40 students of class IX in an examination are given below: 18, 8, 12, 6, 8, 16, 12, 5, 23, 2, 16, 23, 2, 10, 20, 12, 9, 7, 6, 5, 3, 5, 13, 21, 13, 15, 20, 24, 1, 7, 21, 16, 13, 18, 23, 7, 3, 18, 17, 16 Present the data in the form of a frequency distribution using the same class size, one such class being 15-20 (where 20 is not included)

The following data : 2, 5, 15, 25, 20, 12, 8, 7, 6, 16, 21,17, 30, 32, 23, 40, 51, 15, 2, 9, 57, 19, 25 is grouped in the classes 0 –5, 5 –10, 10 –15 etc. Find the frequency of the class 20 –25.