.Find the median when mean = 20 and mode = 18.is it 19.3 cm ?

The relation between mean , median mode is : 2 Mean = 3 Median - Mode.

Mean = 20 and mode = 18  (Given)

Putting the above values in the equation, we get

2 × 20 = 3 × Median – 18

3 Median = 40 + 18

3 Median = 58

Median  = 58/ 3

Median = 19.33