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vivek.kapoor83
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Refer to Ron's solution here:
https://www.manhattangmat.com/forums/if- ... -t821.html
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vittalgmat
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Ans is A.
Stmt 1 says that the Z is > 5.5 (the mid point of 1 and 10).
So avg of x and 10 will be >= x and <= 10. So A is sufficient.
Commonsense Takeaway:
Avg of two numbers is never less than lesser of the two numbers OR
greater than the greater of the two numbers.
Mathematically, if x and y are two numbers:
x <= avg <= y.
Stmt 2 is obviously insufficient.
HT Helps
Stmt 1 says that the Z is > 5.5 (the mid point of 1 and 10).
So avg of x and 10 will be >= x and <= 10. So A is sufficient.
Commonsense Takeaway:
Avg of two numbers is never less than lesser of the two numbers OR
greater than the greater of the two numbers.
Mathematically, if x and y are two numbers:
x <= avg <= y.
Stmt 2 is obviously insufficient.
HT Helps