Question

the class marks of the interval 15-20

Answer 1

✴Heya friend here is ur ans

class mark = x
lower limit = 15
upper limit = 20

therefore ,
x = lower limit + upper limit / 2
x = 15 + 20 / 2
x = 35/2
x = 17.5

THEREFORE class mark (x) is 17.5 .

i hope it was helpful
✴plzz mark ir as brainlest ✴

Answer 2

Let the class mark be x.

so by condition
x = 15 + 20 / 2
x= 35 /2
x= 17.5
therefore class mark is 17.5