Question

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

Answer:

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

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

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

Total number of students = 25

Percentage of students good at math =72%

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

Number of students not good at math.

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

$\red{★}$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

$\blue\bull$Thus, Percentage of students not good at maths = 28%

$\orange\bull$Now,

$\purple{↬}$ 72 × 25/100 = 18

$\red\bull$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

♣ $\huge \tt \pink{\underline{Solution:}}$

Given :-

Total number of students = 25  

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To find:-

Students not good in mathematics =?

$\purple{\rule{45pt}{7pt}}\red{\rule{45pt}{7pt}}\pink{\rule{45pt}{7pt}}\blue{\rule{45pt}{7pt}}$

Number of good students in mathematics  = 72% of 25 

= (72/100) x 25

= 72/4 =18

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

• Hence, Number of students not good in mathematics are 7

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