Query in the Gmat prep now Geometry video

[prernamalhotra]

If AE=EC, what is the length of AB? (diagram attached)

1) AC =10
2) X=30

The video mentions that since both the statements force AB to have only one length the two statements are sufficient.

Since the question asks what is the length, shouldn't the result be dependent on which statement results in a value/ if both statements result in a value.

Thank you,
Prerna

[mathrupradeep]

Is the answer is C ?

[mathrupradeep]

Is the answer is C ?

[Brent@GMATPrepNow]

If AE=EC, what is the length of AB? (diagram attached)

1) AC =10
2) X=30

The video mentions that since both the statements force AB to have only one length the two statements are sufficient.

Since the question asks what is the length, shouldn't the result be dependent on which statement results in a value/ if both statements result in a value.

Thank you,
Prerna

The video that Prerna refers to can be found here: https://www.gmatprepnow.com/module/gmat- ... cy?id=1103 The question begins at the 3-minute mark.

The correct answer is, indeed, C

I'm not sure what you are asking above (in green), Prerna.
The statements COMBINED are sufficient to answer the target question. However, each statement ALONE is not sufficient.

Cheers,
Brent