Question

if John has 100 family members 50%of them have been a car accident. 30% have had cancer how many of them are healthy ​

Answer 1

There's not enough information to answer this question accurately.

Step-by-step explanation:

There is no indication of how many of the 50% (50) who have been in a car accident are unhealthy. It is possible to be in an accident and remain healthy and completely free from injury. Also, there's no indication how many members are unhealthy due to cancer or the accident.

Answer 2

20%

Step-by-step explanation:

John has 100 family members.

50% + 30% = 80% unhealthy family members

100% - 80% = 20% healthy family members