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Suppose we have 3 capacitors, C1, C2, and C3.

If C1 is connected to a battery it's charge is 30.8 microC. C1 is disconnected and discharged.

If C1 and C2 are connected in series to the same battery, their charge is 23.1 microC. Both are disconnected and discharged.

If C1 and C3 are connected in series their charge is 25.2 microC. All 3 are disconnected and discharged.

Now, if all 3 are connected in series to the same what is the resulting charge?

Ive tried so many different ways using the formula for series capacitors and Q=CV and Ive had no luck solving this problem.

There must be some rule (or trick) Im missing involving combing C12 and C13 that im completely missing. Can anyone offer any insight into solving this problem?