Steve has these scores on the exam for this semester 89,92, and 87. How much will he have to make on the fourth exam to have a final average of an A(92% or better )?
100%
98% or better
96% or better
90% or better

Question

Steve has these scores on the exam for this semester 89,92, and 87. How much will he have to make on the fourth exam to have a final average of an A(92% or better )?
100%
98% or better
96% or better
90% or better

anonymous · Answer

Well, his average now would be (89+92+87)/3
That equals 89.3 percent.

Let's test out each score.
If we added 90% to his scores, his average would then be (89+92+87+90)/4
This equals 89.5%
This answer can't be right because he wants to get at least 92%.

If you understand where I'm going with this, you can try out the other three possibilities. If not, I can help you more.