if the class marks in frequency distribution weights of students be 128, 137, 146, 155, 164, 173,& 182 kgs then the first class boundary is.
option
a. 121.5
b. 122.5
c. 123.5
d. 124.5

• 1st boundary so take 128 ie
  128-(137-128)/2=123.5
  here v hv to take next number of 128 such that n1-(n2-n1)/2
• 10 years agoHelpfull: Yes(17) No(11)