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The arithmetic mean of six grades is 87. If the lowest grade is dropped, the mean is 89. What is the lowest grade?

 Apr 6, 2020
 #1
avatar+924 
+4

If the mean is 87, that means the sum of the grades is 6*87= 522. If the lowest grade is dropped that leaves 5 grades with an averagve of 89. SO the sum of those 5 is 5*89= 445. To find the grade subtracted, you find the difference of theses sums which is 522-445= 77 which is your answer.

 

 

Hope it helps!

 Apr 6, 2020
 #2
avatar+924 
+2

Btw how many questions will you be asking? frown

 Apr 6, 2020
 #4
avatar+386 
+1

do u not want me to ask questions

 

 

I just need help I'm not asking u to do homework 

 

I have tried these problems before and I got the wrong answer that why I ask questions for help

 

so pls understand

Paresh  Apr 6, 2020
edited by Paresh  Apr 6, 2020
 #5
avatar+924 
0

No I didn't mean that, I just noticed a bunch of questions from the same user that's all. blush

HELPMEEEEEEEEEEEEE  Apr 6, 2020
 #6
avatar+386 
0

oh ok its also my fault I will be more sensible

Paresh  Apr 6, 2020
 #3
avatar+112185 
+2

If  the   mean  of  the six grades  is  87, there were  6 * 87  =   522 total points

 

If  the mean of  6 grades  is 89, there were a total  of  455 points

 

Then  the  dropped grade  must  have been    522 - 455  =  77

 

 

cool cool cool

 Apr 6, 2020

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