please help

A bowl contains 2 red cards and 2 blue cards. There is also a. mys- terious 5th card which is either red or blue (with equal chances) but its color is unknown. You reach into the bowl and randomly pick a card. Look at its color. Replace it back into the bowl. Reshuie and repeat the ex- periment. You do the experiment 10 times in a row. You observe that you got '3' red cards and 3 blue cards. What is the probability that. the mysterious card is Red