The number of commutative binary percations on the set $\{\mathrm{abc}, \mathrm{d}\}$ is $2^{\mathrm

Question

The number of commutative binary percations on the set $\{\mathrm{abc}, \mathrm{d}\}$ is $2^{\mathrm{a}}$ where $\mathrm{n}=$

Professor PC Thomas Classes · Answer

Number of commutative binary operation on a set of m elements is \ $\mathrm{m}^{\frac{\mathrm{m}(\mathrm{m}+1)}{2}}=4^{\frac{4 	imes 5}{2}}=4^{10}$