Question 109(ii)

A survey was carried out to find the favourite beverage preferred by a certain group of young people. The following pie chart shows the finding of this survey ?

If 45 people like tea, how many people were surveyed ?

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Solution

From the pie chart, number of people who like tea = 45
$\Rightarrow$ 15% of total number of people surveyed = 45
$\Rightarrow \frac{15}{100} \times$ Total number of people surveyed = 45
$∴$ Total number of people surveyed $= \frac{45 \times 100}{15} = 300$

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Q. Question 1(i)
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The adjoining pie chart shows the findings of this survey.
From this pie chart, answer the following:

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(i) If 20 people liked classical music, how many young people were surveyed?

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Q. Question 1(iii)
A survey was made to find the type of music that a certain group of young people liked in a city.

Adjoining pie chart shows the findings of this survey.
From this pie chart, answer the following:

If a cassette company were to make 1000 CDs, how many of each type would be they make?

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Question 109(ii) A survey was carried out to find the favourite beverage preferred by a certain group of young people. The following pie chart shows the finding of this survey ? If 45 people like tea, how many people were surveyed ?

From the pie chart, number of people who like tea = 45 ⇒ 15% of total number of people surveyed = 45 ⇒15100× Total number of people surveyed = 45 ∴ Total number of people surveyed =45×10015=300

Question 109(ii)

A survey was carried out to find the favourite beverage preferred by a certain group of young people. The following pie chart shows the finding of this survey ?

If 45 people like tea, how many people were surveyed ?

From the pie chart, number of people who like tea = 45
$\Rightarrow$ 15% of total number of people surveyed = 45
$\Rightarrow \frac{15}{100} \times$ Total number of people surveyed = 45
$∴$ Total number of people surveyed $= \frac{45 \times 100}{15} = 300$