Question

16.72% of 25 students are good in mathematics. How many are not good in mathematics?​

Answer 1

Answer:

7

Step-by-step explanation:

As we know that the percentage of good students is 72%

and in total there are 25 students.

So, the percentage students not good in mathematics are,

=(100−good%)=(100−72)%=28%

Hence, in order to calculate the number of students who are not good at maths, we need to calculate a total 28%

of 25

students.

As, n%ofA=n100×A

, using this we get,

⇒

Number of students who are not good in maths=28100×25

On simplification we get,

⇒

Number of students who are not good in maths=284

On dividing 28 by 7 we get,

⇒

Number of students who are not good in maths=7

Hence, the total number of students not good in mathematics is 7.