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Bunuel
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Active GMAT Club Expert! Tag them with @ followed by their username for a faster response.
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As the question states that each term is determined by multiplying the prior term by 2 and dividing that product by 3.
so we can see series will be like x, 2x/3, 4x/9 and so on..
and it has a common ration of 2/3 so its a GP and to calculate nth term we have formula a*r^(n-1) where a is first term and r is the ratio
So we have the common ration and all we need is first term to find the 100th term.

Statement 1:
x+ 2x/3 = 15 and we get first term. Sufficient
Statement 2:
Directly tells about first term. Hence, it is also sufficient.

D is the correct answer.
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As the question states that each term is determined by multiplying the prior term by 2 and dividing that product by 3.
so we can see series will be like x, 2x/3, 4x/9 and so on..
and it has a common ration of 2/3 so its a GP and to calculate nth term we have formula a*r^(n-1) where a is first term and r is the ratio
So we have the common ration and all we need is first term to find the 100th term.

Statement 1:
x+ 2x/3 = 15 and we get first term. Sufficient
Statement 2:
Directly tells about first term. Hence, it is also sufficient.

D is the correct answer.
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Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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