The mean increases. When Deleware (2,000: 2) is included the mean must be divided by 9 instead of 8.
286 ÷ 5 1/2 hours = 286 ÷ 5.5 = 52 final answer
Answer:
The number of test required is: 55
Explanation:
Using combination formula:
n!/x!(n-x)!
= 11!/2!(9)!
= 55
What is the weight of the cow?
