AmritaA wrote:
The difference between John's and Paul's heights is twice the difference between John's and Thom's heights. If John is the tallest, what is the average (arithmetic mean) height of the three?
1) Paul is 163 centimeters tall
2) Thom is 173 centimeters tall
Sent from my ONE A2003 using GMAT Club Forum mobile app
Given: J-P=2(J-T) or J+P= 2T
Asked : (J+P+T)/3 =3T/3 = T
Statement 1: P=163 cm. Info not sufficient to determine what is asked
Statement 2: T=173. Sufficient
Hence B.
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