Question

spiderman and batman are having red marbles and black marbles of ratio 9:1 and 7:1 and both the persons have 240 marbles.what is the number of red marbles with batman?​

Answer 1

Answer:

here we can see batman has red and black marbles of ratio 7 : 1

let us think, the common ratio is x

so batman has 7x red marvels and x black marvels

the total number of marvels is 240

now, 7x + x = 240

or, 8x = 240

or, x = 30

so, finally we get .. batman has 7x = ( 7 × 30 ) = 210 red marvels .