[tex]\large\bf{\underline{Given:}}[/tex]
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[tex]\large\bf{\underline{To\:find:}}[/tex]
[tex]\bf{Let\:the\:total\:no.\:of\: kitten\:x}[/tex]
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[tex]\large\bf{\underline{Therefore}}[/tex]
[tex]\bf{⟹30\%\:of\:x=3}[/tex]
[tex]\bf{⟹\frac{30}{100}\times x= 3}[/tex]
[tex]\bf{⟹x= 3\times \frac{100}{30}}[/tex]
[tex]\bf{⟹x=10}[/tex]
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[tex]\large\bf{\underline{Hence}}[/tex]
[tex]\bf{There\:are\:10\: kittens\:in\:the\: litter}[/tex]