Among patients who did not relapse, which treatment was most effective, and what's its conditional relative frequency?
a. desipramine, at 14/72 = 19.44 %
b. lithium, at 6/24 = 25%
c. desipramine, at 14/24 = 58.33%
d. lithium , at 6/72 = 8.33%

For those who achieve a year of sobriety, less than half will relapse. If you can make it to 5 years of sobriety, your chance of relapse is less than 15 percent.

So A

step-by-step explanation:

the multiplicative inverse of a fraction a/b is b/a. for the multiplicative inverse of a real number, divide 1 by the number. for example, the reciprocal of 5 is one fifth 1/5 or 0.2, and the reciprocal of 0.25 is 1 divided by 0.25, or 4.