Question

answer it fast guys plz step by step​

Answer 1

Step-by-step explanation:

lets suppose lower class limit is X and upper class limit is y. so class mark will be (x+y)/2 so X+y will be 7.5*2=15 and class size is 10 i.e. y-x =10

y+x=15

y-x=10

adding both equations

2y=25

y=12.5

so X will be 2.5.

the class is 2.5-12.5

Answer 2

Answer:

please mark as brainliest

Step-by-step explanation:

answer

3