(iv) For an A.P., the first term is 4 and the last term (tn) is 31. The sum of all the terms is 420. What is the value of n?
(A) 12 (B) 24 (C) 10 (D) 20
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(iv) For an A.P., the first term is 4 and the last term (tn) is 31. The sum of all the terms is 420. What is the value of n?
(A) 12 (B) 24 (C) 10 (D) 20
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Answer :
Option (B) 24 is correct
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Verified answer
Answer:
B) 24
Refer the attachment
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