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Question Number 31919 by mondodotto@gmail.com last updated on 16/Mar/18

Commented by mondodotto@gmail.com last updated on 16/Mar/18

$$\mathbf{please}\mathbf{help}\mathbf{this}$$

Commented by Tinkutara last updated on 16/Mar/18

18 men or women take Mathematics in 3rd line?

Commented by mondodotto@gmail.com last updated on 16/Mar/18

$$\mathbf{both}\mathbf{of}\mathbf{them}\mathbf{i}\mathbf{think}$$

Answered by mrW2 last updated on 17/Mar/18

$$20men:$$$$4takeonlymathe,16takeonlychem,nonetakesboth$$$$20women:$$$$1takesonlymathe,6takeonlychem,13takeboth$$$$$$$$\left(i\right)$$$$13womentakebothsubjects$$$$\left(ii\right)$$$$4mentakemathe$$

Commented by MJS last updated on 17/Mar/18

$$m=menw=women$$$$1=onlymath2=both3=onlychem$$$$1.m1+m2+m3=20$$$$2.w1+w2+w3=20$$$$3.m1=4$$$$4.w3=6$$$$5.m1+m2+w1+w2=18$$$$6.m2+w2=13$$$$easytosolvethese$$

Commented by mondodotto@gmail.com last updated on 17/Mar/18

$$\mathbf{sir}\mathbf{please}\mathbf{draw}\mathbf{a}\mathbf{ven}\mathbf{diagram}$$

Commented by mondodotto@gmail.com last updated on 17/Mar/18

$$\mathbf{sir}\mathbf{can}\mathbf{you}\mathbf{please}\mathbf{draw}\mathbf{a}\mathbf{venn}\mathbf{diagram}?$$

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