Joke Collection Website - Bulletin headlines - (20 12? In order to improve the water-saving awareness of the citizens in Shenyang, the relevant departments conducted a random survey of some citizens on "the most effective water-saving measures you
(20 12? In order to improve the water-saving awareness of the citizens in Shenyang, the relevant departments conducted a random survey of some citizens on "the most effective water-saving measures you
(20 12? In order to improve the water-saving awareness of the citizens in Shenyang, the relevant departments conducted a random survey of some citizens on "the most effective water-saving measures you think".
Solution: (1)75÷ 15%=500 people;
(2)n=25500× 100%=5%，
m = 1-20%- 15%-25%-5% = 1-65% = 35%，
(3) Number of people in group A: 500×20%= 100,
Number of people in group C: 500×35%= 175,
Complete the statistical chart as shown in the figure:
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