Question

1. The table shows the average low temperature at Anchorage, Alaska, from December 17 to December 24. At the bottom of the table is the average temperature for the 8-day period.
17-dec
18 -dec -8
19 -dec 1
20 -dec 10
21 -dec -1
22 -dec 7
23 -dec 4
24 -dec 6
average=1.25

What was the low temperature on December 17?

Answer 1

This problem is about statistics. From December 17 to December 24, there are a total of 8 temperatures as data. However, one is missing, so you only have 7. Since the average is known, we start from there:

By adding all the known data, the total is 37. Taking into account the unknown, the sum is (37 + x). Thus,

(37 + x)/8 = 1.25

This results to x = -27. The low temperature on December 17 was -27.