Question
If p is the arithmetic mean of the positive numbers a and b, and the reciprocal of the number q is the arithmetic mean of the reciprocals of a and b. then p– q =?
Options:
A .
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B .
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C .
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D .
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| E . 0 |
Answer: Option B
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B
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:
B
let a=2 and b=4, then p=3
1/2+1/4 = 3/4
Arithmetic mean = 3/8. Hence q= 8/3. P-Q= 3-8/3= 1/3. Look where you are getting 1/3 in the answer options. Answer is option (b)
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