Specialist2024 NHT Exam 2 Section A · Q20CAS active1 mark
Variance of total thickness of notebooks and textbooks
A publisher prints a large number of notebooks and textbooks.
The thickness of the notebooks is known to have a variance of , and the thickness of the textbooks is known to have a variance of . The variance of the total thickness of a random sample of notebooks and textbooks is , and the variance of the total thickness of a random sample of notebooks and textbooks is .
The values of and are respectively
Hints, answer checking and worked solutions come with a Season Pass.