Makakuha ng detalyadong mga sagot sa lahat ng iyong tanong sa IDNStudy.com. Magtanong at makatanggap ng maaasahang sagot mula sa aming dedikadong komunidad ng mga eksperto.

3. Justine took a pre-test and post-test to measure his proficiency in Math. His score in
the pre-test was 90 and his score in the post test was n. If the average of the two tests is 91,
what is an equation that can be used to solve for his post-test score?
a. 90+n= 91
2
b. 91+ = 90
2
c. 90-n = 91
2
d. 91-n = 90
2​