Question

3. 72% of 25 students are good in mathematics. How many are not good in

mathematics?​

Answer 1

Answer:

7

Step-by-step explanation:

72 percent of 25

= 25/100 x 75=18

so 18 students are good at mathematics

students who are not good at mathematics = 25-18

= 7

so 7 students are not good at mathematics

Answer 2

Answer:

• $7$ students out of $25$ are not good in mathematics.

Step-by-step explanation:

Given : $72$% of $25$ students are good  in mathematics.

To find : Number of students who are not good in mathematics.

Solution :

• It is given that $72$% of $25$ students are good  in mathematics.
• We have to find the number of students who are not good in mathematics.
• To find the number of students who are good in mathematics, we have to calculate  $72$% of $25$.

• So,

       $72$% of $25$ =  $\frac{72}{100} *25$

               = $0.72*25$

               = $18$

• ∴ $18$ students out of $25$ are good in mathematics.
• Now, the number of students who are not good in mathematics

           = $25-18$

           = $7$

• ∴ $7$ students out of $25$ are not good in mathematics.