Question

A chalk contains calcium carbon and oxygen in the ratio 10∶3∶12 find the percentage of calcium in chalk​

Answer 1

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Answer 2

Given : ↴

A chalk contains calcium, carbon and oxygen in the ratio 10 ∶ 3 ∶ 12.

To find : ↴

We have to find the percentage of calcium in chalk.

So, Let's Start : ↴

$\sf \: Calcium \: : \: Carbon \: : \: Oxygen$

$\sf \: 10 \: : \: 3 \: : \: 12$

Now, ↴

$\sf \: Percentage \: of \: calcium \: in \: chalk \: is :$

$\sf \: Chalk \: \% \: = \: \cfrac{Parts\: of \: carbon}{Total \: \: Parts} \: \times \: 100$

$\sf \: Here \: the \: Favourable \: Outcomes \: is \: 3.$

$\sf \: Total \: Outcome \: = \: 10 \: + \: 3 \: + \: 12$

$\sf \: \longrightarrow \: 10 \: + \: 3 \: + \: 12 \: = \: 25$

$\sf \: Chalk \: \% \: = \: \cfrac{3 }{25 } \: \times \: 100$

$\sf \: \cfrac{3 }{ \not2 \not5 } \: \times \: \not1 \not0 \not0 \: = \: \cfrac{3}{5} \: \times \: 20$

$\sf \: \cfrac{ \not3}{ \not5} \: \times \: \not2 \not0 \: = \: \cfrac{3}{1} \: \times \: 4$

$\sf \: Answer \: = \: 3 \: \times \: 4 \: = 12$

$\: \sf \longrightarrow \: 12 \: \% \: is \: the \: answer.$