A mother-child health survey asks young mothers about feeding habits. One of the questions asks:

Q1: When feeding your baby, how often do you do any of the following things?

Putting your baby to sleep with a bottle of milk:

The response options are:

Always Often Occasionally Rarely Never Below, you see a frequency table, which is based on the responses the twenty mothers who responded to the survey.

Frequency Table:

Sleep with Milk

Frequency

Valid Percentage

"Always"

8

40%

"Often"

4

20%

"Occasionally"

1

5%

"Rarely"

3

???

"Never"

4

20%

Total

20

100%

QUESTION: What is the valid percentage for the response option "rarely" for this frequency table?

5%

10%

15%

20%