Question

72% of 25 student are good in mathematics. How many are not good in mathematics
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Answer 1

Answer:

Given 72% of 25 students are good in mathematics

∴(100−72)%×25=28%of 25

=28÷100×25=7

Hence, 7 students are not good in mathematics

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Answer 2

Answer:

7

Step-by-step explanation:

Given that,

72 percent of 25 students are good in mathematics.

No. of students good in maths =( 72 /100) *25

= 18 students

Therfore 18 students are good in mathematics.

Number of students who=(total no.of students - no.

are not good in maths of students good at maths)

= 25 - 18

= 7 students

Therfore 7 students are not good at mathematics.

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