Find the mean of the following data, using assumed-mean method: Class0−2020−4040−6060−8080−100100−120Frequency203552443831
Simplify.480÷2of40-21+36÷6+3¯
In a class, following were the marks obtained by 20 students in a maths test. 20, 40 ,50 ,20 , 60 , 50 ,100, 20, 50, 100, 40, 60, 100, 50, 20 ,60, 100 , 50, 40 , 20. Make a frequency distribution table. [2 MARKS]