Question

To get a b in​ math, alexandria pappas must average 80 on five tests. scores on the first four tests were 8282​, 7777​, 8181​, and 7474. what is the lowest score that she can get on the last test and still get a​ b?

Answer 1

The scores of Alexandria are 82, 77, 81, 74 and x, the score of the last test.

the average of these 5 is
`(82+77+81+74+x)/(5)= (314+x)/(5)`,

to get a b, the average must be at least 80.

So,


`(314+x)/(5) =80`

314+x=400

x=400-314 = 86


Thus, to get a B, Alexandria must score at least 86 on her last test.


Answer: 86