Grouped Frequency Distribution Table from a Data set

voice is too low

Can anyone explain how he went from 80 to 92 when he added 13? How’s that possible?

Voice is not clear at all

Thank u much that's really helpful
Can u do for us how to draw a chart ?
I have a problem with the numbers in the frequency line sometimes I don't know if I start with 2 or 1 or other numbers

Thanks a lot sir💪💪💪💪💪💪💪💪

Thank you! Very clear explanation.

Thank you,you explained it very clearly

Very clear explanation. I was struggling. Thank you Sir

What if they did not ask any classes?

thank you

this helps a lot, thanks

Rrb ntpc one has asked on frequency

Thank you so much for your explaination

not nad