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There are 8 members in a family. Four of them have positive attitudes while the other four have negative attitudes.


Among the group of four who have positive attitudes, the third member is the child of the first and second members while the fourth member is not.


Among the group of four who have negative attitudes, the third member is the child of the first and second members while the fourth member is not.


The third member in the group of positive attitudes motivates himself and receives motivation from other 7 members of the family too.


The fourth member in the group of negative attitudes provides demotivation to other 7 members of the family and demotivates himself as well.


Who are these people?

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1 Answer 1

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I think they are

Blood groups

namely

A, B, AB and O, with respective -/+ Rh factors

Resolved statements:

(1/2) AB has A & B antigens, while O has none
(3) AB+ receives from all and only gives to AB+
(4) O- gives to all, receives only from O-

enter image description here

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