Question

40 students of section A of class XII obtained 40 mean marks in statistics while 60 students of section B obtained 45 mean marks in statistics.Find out mean marks in statistics for classXI as a whole.

Answer 1

Here we will calculate combined mean... if u R asking whole mean of class XII


Here N1= 40. X1 = 40

N2 = 60. X2 = 45


Now Mean X12 = (N1×X1 + N2×X2)/ N1+N2

Mean = (40×40+60×45)/40+65

Mean of whole class is = 40.95


hope it helps
#jerri

Answer 2

Answer:

i like ur Skechers u like new my gucci shoes and comment share ❤️