In a certain city only two cellular (mobile) phone services are available. One is Radiance and other is DSML. It is known that 25% of the city population uses the services of Radiance and 20% uses the services of DSML.while 8% uses both Radiance and DSML. It is also known that 30% of those who uses Radiance services but not services of DSML have prepaid cards and 40% of those who uses DSML .but not Radiance have prepaid cards while50% of those who uses the services of both Radiance and DSML have prepaid cards. What percentage of the population have prepaid cards?

In a certain city only two cellular (mobile) phone services are availa

1.	In a certain city only two cellular (mobile) phone services are available. One is Radiance and other is DSML. It is known that 25% of the city population uses the services of Radiance and 20% uses the services of DSML.while 8% uses both Radiance and DSML. It is also known that 30% of those who uses Radiance services but not services of DSML have prepaid cards and 40% of those who uses DSML .but not Radiance have prepaid cards while50% of those who uses the services of both Radiance and DSML have prepaid cards. What percentage of the population have prepaid cards?
Answer» `12.5%` `10%` `13.9%` `20%` ANSWER :`=13.9%`