Question

there are 10 students in 12th class some are maths and some are bio students the number of bio student are four more than maths student st find the number of maths students and bio students​

Answer 1

Answer:

3 Maths students

7 Biology students

Step-by-step explanation:

Let the number of Biology students = b and Maths students = m

ATQ

b = 4 + m

b + m = 10

Substitute b with 4+m

4 + m + m = 10

2m = 10 - 4

2m = 6

m = 3

b = 4 + m

b = 4 + 3

b = 7

Answer 2

Answer:

Let ,

no of maths students=x

no of bio students=y

According to question,

x+y=10 .........(1)

y-x=4 ..............(2)

From (1)

x=10-y...........(put in (2))

y-x=4

y-(10-y)=4

y-10+y=4

2y-10=4

2y=4+10

2y=14

y=7.......(put in (1))

x+y=10

x+7=10

x=10-7

x=3

Therefore;

no of maths students=3 ,and

no of bio students=7

Hope it Helps!!