NIMCET 2012 Question Paper with solutions

© examsiri.com

Question : 1 of 120

Marks: +1, -0

If if is the harmonic mean between P and Q,then

H/P+H/Q

is

2
${P+Q}/Q$
${PQ}/{P+Q}$
None of these

Solution:

Given that, H is the harmonic mean between P and Q
i.e., H =

{2PQ}/{P+Q}

⇒

H/2

=

{PQ}/{P+Q}

⇒

2/H

=

{P+Q}/{PQ}

... (i)
Now,

H/P+H/Q

= H

({P+Q}/{PQ})

= H .

2/H

= 2 [from Eq. (i)]

© examsiri.com

Go to Question:

Next Question