A. 45 hope this is the correct answer if not, sorry!
Answer:
solve by your self dont depend on other!
Given that
Marks of ten friends
23%, 37%, 45%, 49%, 56%, 63%, 63%, 70%, 72% and 82%
Mean = 56
Variance = 284.6
Standards deviation = 16.9
The answer should be 30x+120
Step-by-step explanation:
