The arithmetic mean (average) of four numbers is 85. If the largest of these numbers is 97, find the mean of the remaining three
numbers. I cannot solve this. Please help on it.
1 answer:
Answer:
81
Step-by-step explanation:
Let's do this systematically:
Four numbers: a, b, c, d
Whose mean is 85:
Whose largest number is 97:
Lets solve for the other numbers:
a+b+c+97 = 85*4 = 340
340 - 97 = 243
a+b+c = 243
at this point it doesn't matter what the numbers are, they just need to add up to 243.
We can do 243÷3=81, which is our answer
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