The average (arithmetic mean) of a set of n numbers is 19. If the average of the 6 greatest numbers in the set is 29 and the ave
rage of the remaining numbers is 7, what is the value of n?
2 answers:
Answer:
11
Step-by-step explanation:
The number of numbers whose average is 7 is (n-6), so the overall equation for the average of the numbers in the set is ...
(7(n-6) +6(29))/n = 19
7n +132 = 19n . . . . multiply by n, collect terms
132 = 12n . . . . . . . . subtract 7n
11 = n . . . . . . . . . . . divide by 12
The value of n is 11.
Answer:11
Step-by-step explanation:
You might be interested in
Answer:
Easy, all you ha
Step-by-step explanation:
Answer:
B, False,
Step-by-step explanation:
1/9 is rational number
--------------------
Answer:
16 : 19
Step-by-step explanation:
Given weights of the two castings : 32 lbs and 38 lbs respectively.
Now,
Ratio of the weights of the two castings ;
= 32 : 38
= 16 : 19
Answer:
w=0
Step-by-step explanation: