Question

Ali took five Math tests during the semester and the mean of his test score was 85. If

his mean after the first three was 83, What was the mean of his 4th and 5th tests.


​

Answer 1

Answer:

hmm

Step-by-step explanation:

nice question

but it's so complicated

Answer 2

Answer:

Let marks obtained by him in 1st,2nd,3rd,4th,5th

test be a,b,c,d,e

we have (a+b+c)/3 = 83

Then, a+b+c = 249

And also (a+b+c+d+e)/5 = 85

a+b+c+d+e=425

249+d+e = 425

d+e = 176

Mean of 4th and 5th test = (d+e)/2

= 176/2 = 88