A double bar graph compares sales of two products over 4 months. Product A: Jan=50, Feb=60, Mar=55, Apr=70; Product B: Jan=40, Feb=55, Mar=50, Apr=65. What is the difference in total sales?
25
30
35
40
Explanation: Product A total=235, Product B total=210, difference=25
Question 4 of 6
In a grouped frequency table with class intervals 0-9, 10-19, 20-29, the value 19 belongs to which class?
0-9
10-19
20-29
None
Explanation: Upper boundary rule: 19 belongs to 10-19 class
Question 5 of 6
A line graph shows temperature: Jan=5°, Feb=7°, Mar=10°, Apr=15°, May=20°. What is the average rate of increase per month from Jan to May?
3°
3.5°
3.75°
4°
Explanation: Total increase=20-5=15° over 4 months (Jan to May is 4 intervals) → 15/4=3.75° per month
Question 6 of 6
In a survey, 40% chose option A, 35% chose B, and 25% chose C. If the pie chart sector for B has area 28 cm², find the area of the whole circle.
70 cm²
80 cm²
90 cm²
100 cm²
Explanation: Sector area is proportional to percentage; 35% corresponds to 28 cm² → 1% = 28/35 = 0.8 cm² → 100% = 80 cm²
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