Thread: IQ+Reasoning+Maths (get prepared here)
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Old Thursday, March 09, 2017
HammadAnsari HammadAnsari is offline
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Quote:
Originally Posted by Greenboat View Post
What is the arithmetic mean of x & y if 1/x=1/z-1/y & xy=z?
Plz do it step by step so that I can understand
1/x = 1/xy - 1/y
=> 1/x = (1-x)/y
=> 1 = (1-x)/y
=> y = 1-x
=> y+x = 1
=> (y+x)/2 = 1/2
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