Question

answer for this find the mean question​

Answer 1

Answer:

a) 18+33+30+21+13/5

=104.6

b) sum of 200 observations/200=150

sum of 200=200×150

sum of 200=30000

sum of 300/300=100

sum of 300=30000

sum of 300+sum of 200/300+200

30000+30000/500

60000/500

120