# Recover frequency from GRP

Subject: Advertising and Public Relations

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/apr/#tee/practice/numbers/reverse-grp

Canonical: https://deep-learning-study-room.vercel.app/read/apr/tee/practice/numbers--reverse-grp/

Extra drills; no claim that these exact questions or allocated marks appeared in TEE

### Optional practice question. A campaign delivers 180 GRPs and reaches 60% of its defined target. Calculate average frequency. [2 practice marks]

#### Answer

Authored illustration: these numbers were chosen to explain a faculty-note concept. No matching supplied-data question was found in the 14 recovered APR papers. Standalone calculation drills are optional practice; their marks are author-set.

## Given

| GRP | Reach |
| --- | --- |
| 180 | 60% |

## To find

Average exposures per reached person.

## Formula and why



$$
\text{GRP}=R_{\%}\bar f\quad\Rightarrow\quad\bar f=\frac{\text{GRP}}{R_{\%}}
$$



Divide both sides of the GRP equation by reach percentage. Use 60 here, not 0.60.

## Step-by-step solution

#### Step 1. Write the substitution



$$
\bar f=180\div60
$$



#### Step 2. Carry out division



$$
\bar f=3
$$



**Final answer:** Average frequency = 3.

#### Practical interpretation · What the answer means

A matched reach-frequency report can reconstruct average repetition. GRP alone cannot reveal unique reach without another piece of information.