Question

Raja and Rani collected some phone cards in the ratio 3 : 2. When Raja gave away 42 of his phone cards, the ratio of the number of Raja`s phone cards to Rani`s phone cards became 1 : 3. How many phone cards did Rani collect?

Answer 1

she had 24 in the begenning then later gained 42 more....

Answer 2

let the no. of phonecards with raja be 3x and with rani be 2x
ATQ
3x-42 : 2x :: 1:2
3(3x-42) = 2x* 1
9x-126= 2x
9x-2x=126
7x = 126
x=126/7
x= 18
no.of phone cards rani collected =3*18
                                                =54