Question

15-20,20--25,25-30,30-35,35-40,40-45,45-50,50-55 find xi​ plzzzzzz answer

Answer 1

Answer:

xi

Step-by-step explanation:

15-20,20-25,25-30,30-35,35-40,

40-50,50-60,60-65,65-70,70-75,

75-80.=xi