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3. Use lepton universality and lepton-quark symmetry to estimate the branching ratios for (a) the decays b c+e+ue (where the b and c quarks

3. Use lepton universality and lepton-quark symmetry to estimate the branching ratios for (a) the decays b c+e+ue (where the b and c quarks are bound in hadrons) and (b) T e + + v. Ignore final states that are Cabibbo-suppressed relative to the lepton modes.

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