For a study on a new cold medicine, a group of 100 participants with cold symptoms was studied for one month in the spring. one-fifth of the participants were given the cold medicine, and the rest of the participants were given a placebo, a pill that has no active ingredients. of the participants that were given the medicine, 70% felt improvement of their symptoms. of the participants that were given the placebo, 80% felt improvement of their symptoms. what is the probability of randomly choosing a participant who took the placebo, given they did not feel improvement?

25

step-by-step explanation:

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )