Question

carla, bev, and ashley took their unit 2 math test. carla made an 80 and bev made a 75. what was ashleys score on the test if their average was 78.

Answer 1

Ashley = 79

Explanation:

`Average=(Carla+Bev+Ashley)/(3)=78\\\\(80+75+Ashley)/(3)= 78 \\\\(155+Ashley)/(3)=78\\\\(155+Ashley)/(3)*(3)/(1) =78*3\\\\155+Ashley=234\\`

Subtract 155 from both sides;

Ashley = 79