Data Interpretation - MCQ Practice Questions

Understanding:

We must find the amount allocated to Marketing given its sector angle and the total budget.

Formula:

The share of a sector is proportional to its angle out of $360°$:

Step 1: Substitute values.

Answer:

The amount allocated to Marketing is ₹5 crore.

Quick Tip:

A sector angle of $75°$ represents $\frac{75}{360}=\frac{5}{24}$ of the total — always simplify the fraction first to make multiplication faster.

Understanding:

We must find the combined expenditure on Rent and Education.

Formula:

Step 1: Add the two angles.

Step 2: Calculate the combined expenditure.

Answer:

The combined expenditure on Rent and Education is ₹8,100.

Quick Tip:

Simplify $\frac{162}{360}=\frac{9}{20}$ before multiplying — it avoids large intermediate numbers.

Understanding:

We must find the difference in the number of students between Science and Commerce.

Formula:

Step 1: Find students in Science.

Step 2: Find students in Commerce.

Step 3: Find the difference.

Answer:

Science has 100 more students than Commerce.

Quick Tip:

Instead of computing each separately, you can find the difference directly: $\frac{(100-80)}{360}\times 1800=\frac{20}{360}\times 1800=100$.

Understanding:

We must find the combined sales of Regions B and C.

Formula:

First find the total from Region A, then compute B + C:

Step 1: Find the total sales.

Step 2: Find combined sales of B and C.

Answer:

The combined sales of Regions B and C are ₹13.5 lakh.

Quick Tip:

Always derive the total first from the known sector — then every other value is a simple percentage of that total.

Understanding:

We must find how much Cars exceed Trucks.

Formula:

Step 1: Find the total number of vehicles.

Step 2: Find the difference between Cars and Trucks.

Answer:

Cars exceed Trucks by 96,000 vehicles.

Quick Tip:

Computing the percentage-point difference $(40\%-8\%=32\%)$ directly saves you from finding each category separately.

Understanding:

We must find the increase in salary expenditure from 2022 to 2023.

Formula:

Step 1: Salary in 2022.

Step 2: Salary in 2023.

Step 3: Find the increase.

Answer:

The salary expenditure increased by ₹1 lakh.

Quick Tip:

A smaller sector angle in a pie chart does NOT always mean a smaller absolute amount — the total may have grown. Always compute actual values before comparing.

Understanding:

We must find the combined expenditure on Education and Travel.

Formula:

Step 1: Find total monthly expenses.

Step 2: Note that Education + Travel = $20\%+10\%=30\%$ of total expenses.

The closest option is ₹10,800. Let me re-examine: if the percentages are of income (not expenses), then:

The pie chart percentages apply to income directly.

Step 3: Combined amount (30% of income).

Answer:

The combined amount spent on Education and Travel is ₹10,800.

Quick Tip:

When a pie chart shows percentage distribution of income, apply percentages directly to income. The savings information is a distractor here — check whether the chart refers to income or expenditure.

Understanding:

We must find the new number of Alpha mobiles after its market share increases.

Formula:

Step 1: Find the new Alpha market share.

Step 2: Find the new number of Alpha mobiles.

Answer:

The new number of Alpha mobiles sold is 1,60,000.

Quick Tip:

The redistribution detail (taken equally from Beta and Delta) does not affect Alpha's count — only Alpha's final percentage matters for this calculation.

Understanding:

We must find the total annual sales using the given difference between Q2 and Q1.

Formula:

Let total sales $=T$. Then:

Step 1: Set up the equation.

Step 2: Solve for $T$.

Answer:

The total annual sales are ₹7,00,000.

Quick Tip:

Whenever a pie chart question gives the difference between two sectors, directly use the percentage-point difference to set up a single equation — it eliminates the need to find individual sector values first.