A woman with type AB blood is married to a man with type O blood. They have two natural children and one adopted child. Damian has blood type A, Infiniti has blood type B, and Jordan has blood type O.

Which child was adopted?
Explain to your best ability, please.

Jordan

Explanation:

In most cases, an O parent and an AB parent will have only A or B kids.

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.