Q3 of 28 Page 119

72% of 25 students are good in mathematics. How many are not good in mathematics?

Number of students not good in mathematics = (100 – 72)% of 25


 


= (28/100) × 25


= (28/25×4) × 25


(because 100 = 25×4)


= (28/4)


= 7


 

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