It is known that atoms or substance with opposite charges attract each other whereas atoms or substances with same charges repel each other.
Since it is given that two substances present in the container are not attracted towards each other then there is possibility that both the substances have opposite charges.
ANSWER: 50% or 2/4 EXPLANATION: E is a dominant trait and with a dominant E in the offspring it is not attached so half of the offspring would have non-attached earlobes and half would have attached earlobes.