In a set of three numbers, the average of first two numbers is 2, the average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers?
A.2
B.2.5
C.3
D.3.5
Answers
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Hello!! Good evening friend
I will solve ur question
So, see
let the numbers be a,b,c
Given, a+b/2=2
b+c/2=3
a+c/2=4
From the above equation , we get
a+b=4
b+c=6
c+a=8
then, 2(a+b+c)=18
a+b+c=9
Their average will be, a+b+c/3=9/3=3
hope it helps, answer-C
I will solve ur question
So, see
let the numbers be a,b,c
Given, a+b/2=2
b+c/2=3
a+c/2=4
From the above equation , we get
a+b=4
b+c=6
c+a=8
then, 2(a+b+c)=18
a+b+c=9
Their average will be, a+b+c/3=9/3=3
hope it helps, answer-C
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