Question

in a class 35% of student and girl and the rest are boys .If the total number of student in the class are 40, then find the number of boys in the class.​

Answer 1

Answer:

Girls =

5

3

, Boys =(1−

5

3

)=

5

2

.

Fraction of students absent =

9

2

of

5

3

+

4

1

of

5

2

=

45

6

+

10

1

=

90

21

=

30

7

.

∴ Fraction of students present =(1−

30

7

)=

30

23

.

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Answer 2

Answer:

The number of boys in the class is 26.

Step-by-step explanation:

Total number of students in the class $=40$

Percentage of girls in the class $=35\%$

The number of girls in the class:

$=35\%$ of $40$

$=\frac{35}{100}\times40\\ =14$

To calculate the number of boys in the class, subtract the number of girls in the class from $40$.

The number of boys in the class:

$=40-14\\=26$

Therefore, the number of boys in the class is 26.