Ncert solutions

Question 1

Q1) A survey was made to find the type of music that a certain group of young people liked in a city. An adjoining pie chart shows the findings of this survey. From this pie chart, answer the following:

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

(ii) Which type of music is liked by the maximum number of people?

(iii) If a cassette company were to make 1000 CD’s, how many of each type would they make?

Solution:

(i) 10% represents 100 people.

Therefore 20% represents = \frac{100\times20}{10}

= 200 people

Hence, 200 people were surveyed.

(ii) Light music is liked by the maximum number of people.

(iii) CD’s of classical music = \frac{10\times1000}{100}

= 100

CD’s of semi-classical music = \frac{20\times1000}{100}= 200

CD’s of light music = \frac{40\times1000}{100}=400

CD’s of folk music = \frac{30\times1000}{100}=300

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