Question

3. 72% of 25 students are good in mathematics. How many are not good in mathematics?
no spam

Answer 1

$\large\bold\green{\underline{\underline{{Question:-}}}}$

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

$\large\bold\orange{\underline{\underline{{Given:-}}}}$

Total number of students = 25

Percentage of students good at math =72%

$\large\bold\red{\underline{\underline{{To\:Find:-}}}}$

Percentage of students not good at math.

$\large\bold\pink{\underline{\underline{{Solution:-}}}}$

$\red{★}$ Percentage of students not good at maths + Percentage of students good at maths = 100.

$\pink{↬}$ Percentage of students not good at maths + 72 = 100.

$\green{↬}$ Percentage of students not good at maths = 100 - 72 = 28

▪️Thus, Percentage of students not good at maths = 28%

▪️Now,

$\purple{↬}$72 × 25/100 = 18

▪️So, Number of students good at maths = 18

$\blue{★}$Students not good in maths = Total number of students -Number students good in maths.

$\orange{↬}$ Students not good at maths = 25 - 18 = 7

Answer 2

$\underline{\sf \large{Solution-}}$

Given:-

Total number of students = 25  

Number of good students in mathematics  = 72% of 25 

$\implies \sf{\dfrac{72}{100} × 25}$

$\implies \sf{\dfrac{72}{4} = 18}$

Number of students not good in mathematics  = 25 – 18 = 7

• Hence,

• Number of students not good in mathematics  =7