Answer:
35%
Step-by-step explanation:
Total no of advertisement = 600
Percentage advertisement out of first 200 in color = 30%
30% of 200 = 30/100 * 200 = 60
Therefore out of first 200, 60 are in color.
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Percentage advertisement out of next 300 in color = 20%
20% of 300 = 20/100 * 300 = 60
Therefore out of next 200, 60 are in color.
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Percentage advertisement out of last 100 in color = 90%
90% of 100 = 90/100 * 100 = 90
Therefore out of last 100, 90 are in color.
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Total colored advertisement will be sum of 60, 60, 90 advertisement out of first , second and third set of advertisement sold.
which is = 60 + 60 + 90 = 210.
Therefore 210 out of total 600 advertisements sold were in color.
percentage of colored advertisements out of total advertisements will
= (colored advertisements/total advertisements )* 100
substituting the value of colored advertisements sold(210) and total advertisements (600 ) in above expression we have
percentage of colored advertisements out of total advertisements will
= (210/600 )* 100 = 35%
Hence , 35% of the 600 advertisements were in color
