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Question

If x, 3x + 2, x + 10 are in A.P. Find the value of x.

A
1.5
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B
-1.5
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C
1
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D
-1
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Solution

The correct option is B -1.5

Since, x, 3x + 2, x + 10 are in AP.

2 (3x + 2) = x + (x + 10)

6x + 4 = 2x +10

6x - 2x = 10 -4
4x = 6
x = 1.5


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