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In an A.P., the sum of first four terms is 20 and the sum of first three terms is 12. Find the fourth term.

  • A.6
  • B.8
  • C.10
  • D.12

Answer: B

The fourth term is the difference of the two sums.

\[ 20 - 12 = 8 \]

No property of the progression is needed - only that the sums are of consecutive terms.

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