25. The ratio between a two digit number to the product of the digits of the number is 3:1. If the units place and tens place are interchanged, then the ratio of the new number to the sum of the digits is 7:1.The ratio of the sum of the digits to the product of the digits of the number is
(A) 3:4
Sol: Let the digits in tens place and units place are x and y respectively. The number is 10x+y.
Given, =3:1
=7:1
Solving, (1) and (2), x=2 y=4
Ratio of sum to product of digits = =3:4