5 Marks Questions

Question 15 Marks

Avinash works as a lecturer and earns $Rs. 12000$ per month. His wife who is a doctor earns $Rs. 15000$ per month. Find the following ratios:
$i.\ $Avinash's income to their total income.
$ii.\ $Avinash's income to their total income.

Answer

$i.\ $Given that,
Avinash salary $= Rs. 12,000$ per momth.
Wife salary $= Rs. 15,000$ per month.
Avinash's income to wife income $=\frac{\text{Rs. 12,000}}{\text{Rs. 15,000}}$
$=\frac{4}{5}$
$ii.\ $Total income $= 27,000$ per month,
Avinash's income to the total
income $=\frac{\text{Rs. 12,000}}{\text{Rs. 27,000}}$
$=\frac{4}{9}$

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Question 25 Marks

Margarette works in a factory and earns $Rs. 955$ per month. She saves $Rs. 185$ per month from her earnings. Find the ratio of:
$i.\ $Her savings to her income.
$ii.\ $Her income to her expenditure.
$iii.\ $Her savings to her expenditure.

Answer

Margarette earns $-\ 955$ per Savinss $-\ 185$ per moth Expenditure $= 955 - 185 = 770$
$i.\ $Her savings to her incom $=\frac{185\div5}{955\div5}$
$=\frac{37}{191}$
$ii.\ $Her income to her expenditure $=\frac{955}{770}=\frac{191}{154}$
$iii.\ $Her savings to her expenditure $=\frac{185}{770}=\frac{37}{154}$

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Question 35 Marks

If $9\ kg$ of rice costs $Rs. 120.60,$ what will $50\ kg$ of such a quality of rice cost$?$

Answer

$9\ kg$ rice cost $120.60$
$50\ kg$ cost $= ?$
$1\ kg$ rice cost $=\frac{120.60}{9}$
$= 13.4$
$50\ kg$ rice cost $= 13.4 \times 50$
$= 670$
$\therefore 50\ kg$ rice cost $= Rs. 670$

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