Could you please help me?

Dear student,

Total sales = cash sales +credit sales
here credit sales = 25% of cash sales
let cash sales be 'n'
then credit sales = n x 25/100

2,50,000 = n+ n x 25/100
2,50,000 = n + 25n/100
2,50,000 = 100n+25n/100
2,50,000 = 125n/100
2,50,000 x 100 = 125n
25000000 = 125n
25000000/125 = n
2,00,000 = n

cash sales = 2,00,000
credit sales = 2,50,000 -2,00,000 = 50,000

Answer: option (A) - 50,000

Regards