annoying AP

Algebra Level 1

Three numbers A,B and C are in AP if the value of A is 4 and value of C is 10 then what is the value of B.


The answer is 7.

Aman Sharma by Aman Sharma , 25, India

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2 solutions

Ashish Menon
Jun 2, 2016

We just have to insert the arithmetic mean of A and C which is 4 + 10 2 = 7 \dfrac{4 + 10}{2} = \color{#69047E}{\boxed{7}} .

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Ayush Sharma
May 8, 2015

Its a rule that if three numbers are in an AP say a,b,c Then , 2b=a+c ,I dont know the name of the rule if anybody knows please tell me. So just substituting the values, we get 2b=4+10 2b=14 b = 7 \boxed{b=7 }

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