$23 \% \text{ of } 6783 + 57 \% \text{ of } 8431 = ?$

There is a ratio of $5:4$ between two numbers. If $40\%$ of the first number is $12$,then what would be $50\%$ of the second number?

Ramola's monthly income is three times Ravina's monthly income. Ravina's monthly income is $15\%$ more than Ruchira's monthly income. Ruchira's monthly income is $₹ 32,000$. What is Ramola's annual income?

In an examination,there are $1000$ boys and $800$ girls. $60 \%$ of boys and $40 \%$ of girls passed. The percentage of candidates that failed is: (in $\%$)

The price of an article was first increased by $10 \%$ and then again by $20 \%$. If the final increased price is $₹ 33$,what was the original price?

The product of one-third of a number and $150 \%$ of another number is what percent of the product of the original numbers?