make bar graph usins atleast 10 numbers that have mode 15,min5,med10,max20

The bar graph will have the values on the abscissa (X-axis) and the frequency on the ordinate (Y-axis).

The high is 20 and the low is 5, giving you two scores. The mode (15) is at least two more scores. Since the median = 50th percentile, half of all the scores ≤ 10 and half ≥ 10.