Question

Q4.There are 50 students in a
class of which 40 are boys and
the rest are girls. The ratio of
the number of boys and
number of girls is *​

Answer 1

Answer:

number of boys ratio and number of girlsratio is 4:1

Answer 2

Answer:

let consider that number of boys in a class be x.

and number of girls in a class be y.

from first condition

X + Y = 50. ---------- ( 1. )

from second condition

X - Y = 40 . --------- (2)

add equation 1 and 2

X + Y = 50

+ X + Y = 40

_________

2x = 90

X= 90/ 2

X= 40

put x =40 in equation 1

X+ y = 50

40 + Y =50

Y = 50- 40

Y = 10

therefore the ratio of the number of boys and girl is

X: Y = 40 : 10

therefore X : Y = 4 : 1 .