Directions (1 - 4): This is a pie chart for the data on A, B, O, AB blood groups of 150 donors. Observe the pie chart and answer the questions.
Direction image of Pie Chart chapter

The ratio of donors blood group ‘A’ to the average of the donors group ‘O’, ‘B’ and ‘AB’ is:

The number of persons having either blood group ‘A’ or blood group ‘B’ is:

The number of donors having group ‘O’ is:

What is the percentage of donors having blood group ‘AB’ ?