68 elderly men failed a medical test because of defects in atleast one of these organs:heart, lungs and kidneys. 30 of them had heart disease,30 lung disease and 33 kidney disease. 7 of them had both heart and lung disease. 10 had lung and kidney disease while 11 had kidney and heart disease draw a venn diagram to illustrate this information. how many of these elderly men suffered from all the three diseases? how many had only lung disease?

Question

anonymous · Answer

@estudier please have a look at this

anonymous · Answer

lets name all variable first

anonymous · Answer

heart disease = x 
lung = y
kidney = z

anonymous · Answer

then?

anonymous · Answer

then express statements into equation

anonymous · Answer

x + y = 7
y + z = 10
x + z = 11

anonymous · Answer

can u pls draw the venn diagram?

anonymous · Answer

venn diagram is the one with circles overlapping right

anonymous · Answer

yep

anonymous · Answer

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