Question

absentee record of
record of students is
given below. If mean is
15.5, then the missing frequencies x &y are,
No of day. total No of day
0 to 5. 15
5 to 10. 16
10to 15. X
15to 20. 8
20to 25. y
25 to 30. 8
30to 35. 6
35to 40. 4 _____________. ______
Total. =70​

Answer 1

Answer:

I can't understand please explain....