Mathematics

The eleventh term of an AP, is 25 and its first term is -3. Find…

The eleventh term of an AP, is 25 and its first term is -3. Find its common difference.
  • A.
    19/10
  • B.
    21/5
  • C.
    23/11
  • D.
    21/2
  • E.
    24/5
Correct Answer: Option E
Explanation

a + 10d = 25
-3 + 10d = 25
d = 28/10 = 24/5