Three numbers are in AP and their sum is 21. If 1, 5, 15 are added to them respectively,
they form a G. P. The numbers are
(a) 5,7,9
(b) 9,5,7
(c) 7,5,9
(d) none of these
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Answer:
The correct option is (a) 5,7,9.
Step-by-step explanation:
5+7+9= 21 and,
Adding 1,5 and 15 to the numbers respectively we get the numbers as
6, 12 , 24 and their common ratio is 2. Hence 6, 12 and 24 are in GP.
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