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Question-31919




Question Number 31919 by mondodotto@gmail.com last updated on 16/Mar/18
Commented by mondodotto@gmail.com last updated on 16/Mar/18
please help this
$$\boldsymbol{\mathrm{please}}\:\boldsymbol{\mathrm{help}}\:\boldsymbol{\mathrm{this}} \\ $$
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
 both of them i think
$$\:\boldsymbol{\mathrm{both}}\:\boldsymbol{\mathrm{of}}\:\boldsymbol{\mathrm{them}}\:\boldsymbol{\mathrm{i}}\:\boldsymbol{\mathrm{think}} \\ $$
Answered by mrW2 last updated on 17/Mar/18
20 men:  4 take only mathe, 16 take only chem, none takes both  20 women:  1 takes only mathe, 6 take only chem, 13 take both    (i)  13 women take both subjects  (ii)  4 men take mathe
$$\mathrm{20}\:{men}: \\ $$$$\mathrm{4}\:{take}\:{only}\:{mathe},\:\mathrm{16}\:{take}\:{only}\:{chem},\:{none}\:{takes}\:{both} \\ $$$$\mathrm{20}\:{women}: \\ $$$$\mathrm{1}\:{takes}\:{only}\:{mathe},\:\mathrm{6}\:{take}\:{only}\:{chem},\:\mathrm{13}\:{take}\:{both} \\ $$$$ \\ $$$$\left({i}\right) \\ $$$$\mathrm{13}\:{women}\:{take}\:{both}\:{subjects} \\ $$$$\left({ii}\right) \\ $$$$\mathrm{4}\:{men}\:{take}\:{mathe} \\ $$
Commented by MJS last updated on 17/Mar/18
m=men w=women  1=only math 2=both 3=only chem  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  easy to solve these
$${m}={men}\:{w}={women} \\ $$$$\mathrm{1}={only}\:{math}\:\mathrm{2}={both}\:\mathrm{3}={only}\:{chem} \\ $$$$\mathrm{1}.\:{m}\mathrm{1}+{m}\mathrm{2}+{m}\mathrm{3}=\mathrm{20} \\ $$$$\mathrm{2}.\:{w}\mathrm{1}+{w}\mathrm{2}+{w}\mathrm{3}=\mathrm{20} \\ $$$$\mathrm{3}.\:{m}\mathrm{1}=\mathrm{4} \\ $$$$\mathrm{4}.\:{w}\mathrm{3}=\mathrm{6} \\ $$$$\mathrm{5}.\:{m}\mathrm{1}+{m}\mathrm{2}+{w}\mathrm{1}+{w}\mathrm{2}=\mathrm{18} \\ $$$$\mathrm{6}.\:{m}\mathrm{2}+{w}\mathrm{2}=\mathrm{13} \\ $$$${easy}\:{to}\:{solve}\:{these} \\ $$
Commented by mondodotto@gmail.com last updated on 17/Mar/18
sir please draw a ven diagram
$$\boldsymbol{\mathrm{sir}}\:\boldsymbol{\mathrm{please}}\:\boldsymbol{\mathrm{draw}}\:\boldsymbol{\mathrm{a}}\:\boldsymbol{\mathrm{ven}}\:\boldsymbol{\mathrm{diagram}} \\ $$
Commented by mondodotto@gmail.com last updated on 17/Mar/18
sir can you please draw a venn diagram?
$$\boldsymbol{\mathrm{sir}}\:\boldsymbol{\mathrm{can}}\:\boldsymbol{\mathrm{you}}\:\boldsymbol{\mathrm{please}}\:\boldsymbol{\mathrm{draw}}\:\boldsymbol{\mathrm{a}}\:\boldsymbol{\mathrm{venn}}\:\boldsymbol{\mathrm{diagram}}? \\ $$

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