pLeAsE HeLp!

A survey showed that seventy customers bought white bread, sixty-three bought wheat bread, and thirty-five bought rye bread. Of those who bought exactly two types of bread, twelve bought wheat and white, five bought white and rye, and seven bought wheat and rye, Two customers bought all three. How many customers bought only wheat bread?

Question

pLeAsE HeLp!

A survey showed that seventy customers bought white bread, sixty-three bought wheat bread, and thirty-five bought rye bread. Of those who bought exactly  two types of bread, twelve bought wheat and white, five bought white and rye, and seven bought wheat and rye, Two customers bought all three. How many customers bought only wheat bread?

anonymous · Answer

White = 70
Wheat = 63
Rye = 35

Wheat and white = 12
Rye and white = 5
Rye and when = 7

Rye, white, wheat = 2

We need a Venn diagram...

lilai3 · Answer

can you please help me with an example???? thanksssss

tamtoan · Answer

why not try this ?   only wheat = total of wheat subtract all those with wheats and others

lilai3 · Answer

like...??

anonymous · Answer

Because it's hard to subtract the "others"... there are probably overlaps that make it not straightforward.  It might work, but it's not obvious to me.

tamtoan · Answer

hi jake :)
well wheats and others ...they are listed in the problems, so just add them all up..they are not pure wheat...so pure wheat has to be...total subtract all that "not pure" wheats, isn't it? :)

anonymous · Answer

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