The table below shows the favourite subject of the students in Primary 6C. It is used to draw the pie chart shown. Mathematics is the most favourite subject amongst the students. Some parts of the table have been blanked off.
English[blanked]Science[blanked]
1216[blanked]8
How many students chose Science as their favourite subject? Ans: ___

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Worked solution

25

1. Identify the subjects and their corresponding number of students from the table

The subjects are English, Mathematics, Science, and Chinese.
From the table, English has 12 students.
The other two given numbers are 16 and 8.
Since Mathematics is the most favourite subject, it must have the highest number of students. Thus, Mathematics has 16 students, and Chinese has 8 students.

2. Find the total number of students who chose English, Mathematics, and Chinese

Total for English, Mathematics, and Chinese = 12+16+8=3612 + 16 + 8 = 36

3. Determine the percentage of students who chose English, Mathematics, and Chinese

Percentage of students who chose Science = 28%28\%
Percentage of students who chose English, Mathematics, and Chinese = 100%−28%=72%100\% - 28\% = 72\%

4. Calculate the number of students who chose Science

72%72\% of the students →36\rightarrow 36
1%1\% of the students →36÷72=0.5\rightarrow 36 \div 72 = 0.5
28%28\% of the students →0.5×28=14\rightarrow 0.5 \times 28 = 14
So, 14 students chose Science.

Answer

1414

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