By arguement,
M - J = 2(M - K)
So M + J = 2K
Or M + J + K = 3K
To find out the average, we should know the value of (M + J + K). By stmt-2, we are getting that as K = 40000. But not with stmt-1.
So IMO B.
URGENT??
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Source: Beat The GMAT — Data Sufficiency |












