Answer:
sorry i didn't get it
Step-by-step explanation:
There is 1 brother as they would all have the same brother.
Look at the table for the people that used Lithium.
There are 18 relapses, 6 No relapses with a total of 24 people.
The relative frequency for relapse, would be dividing the number of relapses by the total number of people.
This would be D. 18 / 24 = 75%