Luckily your file uses YYYY-MM-SS HH:MM:SS timestamps, which sort alphabetically. Those can be compared with < > <= etc without worrying about any date math. MIN="..." and MAX="..." are where those values are input into awk.
Answer:
C, D, B and A.
Explanation:
Electromagnet in option C is strongest because it has an iron core and the largest current as compared to other solenoids, following by D and then B whereas solenoid A is the weakest because of the absence of an iron core and has the smallest current. Solenoid having iron core is the strongest solenoid because the core produces more strong magnetic field as compared to no iron core.
Answer: 1.5 : 1
Explanation:
The average of 92 marks for the test is a weighted average of the proportion of students in the class.
Assume boys are in the proportion, x.
(90 * x) + (95 * (1 - x)) = 92
90x + 95 - 95x = 92
-5x = 92 - 95
-5x = -3
x = -3/-5
x = 0.6
Boys are 0.6 of the class
Girls are:
= 1 - 0.6
= 0.4
0.6 : 0.4
1.5 : 1
