find median..
20-30. 5
30-40. 15
40-50. 25
50-60. 20
60-70. 7
70-80. 8
80-90. 10
Answers
Answer:
meadian is 50. you can check out in google
Answer:
Classes Frequency (f) Cumulative frequency (cf)
20 - 30 5 5
30 - 40 15 20
40 - 50 25 45
50 - 60 20 65
60 - 70 7 72
70 - 80 8 80
80 - 90 10 90
∑f = 90
S= 40 + 10 = 50 .
Step-by-step explanation: