Choose the correct answer from the given four options:If x% of 80=12, then x is equal to
Compute mean deviation from mean of the following distribution :
Marks10−2020−3030−4040−5050−6060−7070−8080−90No. of students8101525201895
Choose the correct less than type ogive curve for the given data.
Class Frequency 5−10 310−15615−20920−251225−30830−3510
Solve the following pair of equations: 2x+y=7 3x+2y=12 Choose the correct answer from the given options.