Find the mean of the distribution shown below A 580 B1 C21 D
     Find the mean of the distribution shown below.   A 5.80 B.1 C.21 D. 0.25       
 
  
  Solution
To find mean of x
Hence Mean = 5.8
Option A
| x | 3 | 5 | 6 | 7 | |
| P(x) | 0.08 | 0.32 | 0.24 | 0.36 | 1 | 
| xp | 0.24 | 1.6 | 1.44 | 2.52 | 5.8 | 

