Question

30. The average of a list of 4 numbers is 92.0. A new list
of 4 numbers has the same first 3 numbers as the
original list, but the fourth number in the original list
is 40, and the fourth number in the new list is 48. What
is the average of this new list of numbers?
F. 81.0
G. 92.0
H. 94.0
J. 94.4
K. 96.6

Answer 1

Answer:

H. 94.0

Explanation:

The original list: $a _1$ $a _2$ $a _3$ $40$

The new list: $a_1$ $a_2$ $a_3$ $48$

$\frac{a_1+a_2+a_3+40}{4} =92$

$a_1+a_2+a_3=92$ × $4-40=328$

$\frac{a_1+a_2+a_3+48}{4} =\frac{328+48}{4} =94$