Thread:Balu.ur/@comment-25501845-20141110152352/@comment-25501845-20141111010514

HMcCoy wrote:

3) Read the given statement :- (This is confusing)

1.20% of doctors are surgeons.

2.The remaining are physicians.

3.10% of the physicians are neurologists.

What percentage of doctors are neurologists?

a) 2 b) 8 c) 10 d) 20

Like Cdragon, I am also a visual learner. My graduate work is in Set Theory, so I love the Venn Diagrams. Hard to draw here though... :( So...

HINT: Let x be the number of doctors. hmm, Doctors = x
 * 1) Twenty percent are surgeons, so $$ 0.2x $$ are surgeons and the remaining 80%, or $$ 0.8x $$ are physicians.
 * 2) Ten percent of physicians are neurologists, so 10% of 80% of doctors are neurologists. Thus $$ (0.10)\times (0.8x) $$ are neurologists.
 * 3) There is one more calculation to go for you to complete the problem!

So 0.2 x = surgeons

0.8x = physicians

(0.10) x (0.8x) = Neurologists.

Iam getting 8 % here again ;)