Question

find only for above 9th class because ye 9th k formula se nahi karna ​

Answer 1

Answer:

Beautiful handwriting

Answer 2

Answer:

middle value between two interval or add two value and divide it by 2...if the given question is a continuous mean

Step-by-step explanation:

0+20=20/2=10

20+40=60/2=30

40+60=100/2=50

60+80=140/2=70

80+100=180/2=90

100+120=220/2=110

the mean difference for each interval is 20