Question

ln a school boys and girls are equal in numbers.19/20th of the girls and 24/25th of the boys pass the final examination if the number of boys in the school is 1000,how many boys and girls have failed all together?

Answer 1

Answer:

90

Step-by-step explanation:

There are 1000 boys.  The number of boys who passed is

(24 / 25) × 1000 = 24 × ( 1000 / 25 ) = 24 × 40 = 960.

The number of girls is the same as the number of boys, so there are 1000 girls.  The number of girls who passed is

(19 / 20) × 1000 = 19 × ( 1000 / 20 ) = 19 × 50 = 950.

The number of boys who failed is 1000 - 960 = 40.  The number of girls who fails is 1000 - 950 = 50.  In total, the number of students who failed is 40 + 50 = 90.