A doctor is concerned about the relationship between blood pressure and irregular heartbeats. Among her patients, she classifies blood pressures as high, normal or low; heartbeats as regular or irregular and finds that:
a) 16% have high blood pressure .
b) 19% have low pressure
c) 17% have irregular heart beats
d) of those with an irregular heart beats, 35% have high blood pressure
e) of those with normal blood pressure, 11% have an irregular heartbeat.
What percentage of her patients have a regular heartbeat and low blood pressure?
Please, help

Question

A doctor is concerned about the relationship between blood pressure and irregular heartbeats. Among her patients, she classifies  blood pressures as high, normal or low; heartbeats as regular or irregular and finds that:
a) 16% have high blood pressure . 
b) 19% have low pressure
c) 17% have irregular heart beats
d) of those with an irregular heart beats, 35% have high blood pressure
e) of those with normal blood pressure, 11% have an irregular heartbeat.
What percentage of her patients have a regular heartbeat and low blood pressure?
Please, help

loser66 · Answer

@ganeshie8

loser66 · Answer

So far I got:
a) P(high) = 0.16
b) P(low) = 0.19 
therefore P(normal) = 0.65

phi · Answer

draw a Venn diagram  (circles that overlap)

loser66 · Answer

Which one? circle or square one?

phi · Answer

the outer one can be square, divided into 3 parts for low,normal, high

loser66 · Answer

c) P(irre) = 0.17 --> P(reg) = 0.83

loser66 · Answer

how to show heart beats?

loser66 · Answer

d) P(high| irr) = 0.35
e) P(irr |normal) = 0.11

loser66 · Answer

I need find $P(reg \cap low)$

phi · Answer

the low,high, normal do not overlap

loser66 · Answer

so, we just have square diagram, like |dw:1410961978874:dw|
but I don't know how to fill in the blank

phi · Answer

How about|dw:1410962119472:dw|