Question

The average temperature on Monday, Tuesday and Wednesday is 38˚ C. The average temperature on Tuesday, Wednesday and Thursday is 43˚ C. If the average temperature on Monday and Thursday is 18.5˚ C. The average temperature on Monday is

Answer 1

The average temperature on Monday, Tuesday and Wednesday is 38˚ C = ( M+TU+W ) / 3

The average temperature on Tuesday, Wednesday and Thursday is 43˚ C. = ( Tu+W+Th)/3

If the average temperature on Monday and Thursday is 18.5˚ C = (M+TH) / 2

The average temperature on Monday =?

104 = M+TU+W

M = 104 - ( TU+W )

129 = Tu+W+Th

Th = 129 - ( TU+W )

M-Th = 104 - ( TU+W ) - 129 - ( TU+W )

= -25

Th=M+25

18.5˚ C = (M+TH) / 2 = (M+M+25) /2 = (2M+25)/2

18.5 * 2 = 2M+25

M = (36 - 25) / 2 = 11/2 = 5.5°C.