Data Interpretation MCQ Questions and Answers - Line Chart

The number of watches sold in Town Y in April = 210
The number of watches sold in Town X in April = 150
Required percentage
$$\eqalign{ & = \frac{210-150}{150}\times100 \cr & = \frac{60}{150}\times100 \cr & =40\% \cr} $$

Number of watches sold in Town X in the month of May = 180
Number of watches sold in Town X in the month of July
= $$\frac{180\times110}{100}$$
= 198
Number of watches sold in Town X in the month of January = 120
∴ Required ratio
$$\eqalign{ & = \frac{198}{120} \cr & = \frac{33}{20} \cr & = 33:20\cr} $$

Total number of watches sold in Town X in January, February, March and June
= 120 + 140 + 180 + 240
= 680
= Required average
= $$\frac{680}{4}$$
= 170

Number of Watches sold in Town Y in February = 120
Number of Watches sold in Town Y in May = 230
Required percentage increase
$$\eqalign{ & = \frac{230-120}{120}\times100 \cr & = \frac{110}{120}\times100 \cr & = \frac{110\times5}{6}\cr & = \frac{275}{3} \cr & = 91\frac{2}{3}\% \cr} $$

Total number of watches sold in both the towns together in the month of June
= 240 + 180
= 420
Total number of watches sold in both the towns together in March
= 180 + 150
= 330
Required difference
= 420 - 330
= 90