Step-by-step explanation:
is it addition I got 9.75
Answer:

Step-by-step explanation:

Hope this helps.
Answer:
C : does not have statistical significance
Step-by-step explanation:
Because there is a 15% chance of getting that many girls by chance, the method - does not have statistical significance.
By this method, the percentage of girls =
or 51.15%
This type of method does not have practical significance.