The charmed particle decays, D + (1869) e + + anything, D 0 (1869) e + + anything, + c (2285)

The charmed particle decays,

D⁺(1869) → e⁺ + anything, D⁰(1869) → e⁺ + anything, Λ⁺_c (2285) → e⁺ + anything,

are usually assumed to result from the charmed quark decay c → s + e⁺ + ν_e discussed in the previous problem. Assuming that the effects due to quark binding can be neglected, use the data given in the Particle Data Group tables to test this assumption by comparing the measured rates of these decays with each other, and with the estimated rate for the charmed quark decay obtained in the previous problem.