Let's round decimal by decimal until we get two significant figures. When the successor number is smaller than 5 then the predecessor number remains the same. When the successor number is greater than 5 then the predecessor number rounds to the first greater number. If the successor number is 5 then the even predecessor number remains the same and the odd predecessor number rounds to the first greater number. 0.002353 ≈ 0.00235 0.00235 ≈ 0.0024
I got this by taking the 3 test scores that were provided and adding them then subtracting that by 360 (90x4 - which would give you a 90 in the end) so I had 360 - 262 which equaled 98 and that would be the score needed to have a 90 in the end.
