bank L has 40% of people

bank P has 50% of people

bank M has 30% of people

15% are both in bank L and bank P

13% are both in bank L and bank M

11% are both in bank P and bank M

5% are in all three banks

percent of people who are only in one bank of the three

the possible answers are:

a.11% b.17% c.29% d.57% e.86%

?

i have built this diagram and got 57% from suuming the areas which are free

i was told that my digram is wrong because because i didnt mention the people who dont have any bank,

how to know if there are people who are not present in any bank

what is their presentage

??

question B)

find presentage of people with at least one bank?

a.14% b.43% c.57% d.86%

?

in my diargam every one has a bank so its 100%

where is my mistake?