math test scores are 68 ,78,90and 91 what is the lowest score you can earn on the next test and still achieve an average of at least 85
the total points are now 68+78+90+91 = 327
To average 85 on 5 tests, you need 5*85 = 425
So, how many points short is that?
To find the lowest score you can earn on the next test and still achieve an average of at least 85, let's first calculate the average of the current scores.
The sum of the current scores is 68 + 78 + 90 + 91 = 327.
To achieve an average of at least 85, the total sum of all scores must be at least (85 * 5) = 425.
To find the lowest possible score on the next test, subtract the current sum from the desired sum: 425 - 327 = 98.
Therefore, the lowest score you can earn on the next test and still achieve an average of at least 85 is 98.