I am not understanding thisproblem... I am not even sure where to being. Please

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I am not understanding thisproblem... I am not even sure where to being. Please explainthe WHY behind your answer... I will rate!!:

Capacitors C1 = 6.99 mF andC2 = 1.72 mF are charged as aparallel combination across a 219 V battery. The capacitors aredisconnected from the battery and from each other. They are thenconnected positive plate to negative plate and negative plate topositive plate. Calculate the resulting charge on capacitorC1. I am not understanding thisproblem... I am not even sure where to being. Please explainthe WHY behind your answer... I will rate!!:

Capacitors C1 = 6.99 mF andC2 = 1.72 mF are charged as aparallel combination across a 219 V battery. The capacitors aredisconnected from the battery and from each other. They are thenconnected positive plate to negative plate and negative plate topositive plate. Calculate the resulting charge on capacitorC1.

Explanation / Answer

after disconnecting, C1 has charge Q1 =C1V, C2 has charge Q2 =C2V after reconnecting, +Q1 on C1 and-Q2 on C2 will be equally shared by twoplates, so C1 has charge (Q1 - Q2)/2 =(C1 - C2)V/2 = 0.577 C

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