Question

construct less than cummulative frequency

class interval = 0-10 - 10 -20 - 20-30 - 30-40 - 40- 50

frequency = 2 5 3 8 6​

Answer 1

$Mean\:=36.66$

see the pic that i have attached

hope this helps...

Answer 2

maihuunknown ne sahi answer diya hai use brainlist bana do