each coin flip has a 1/2 probability of landing on tails
so 1/2 x 1/2 = 1/4 probability of getting 2 tails
a single die has 3 even numbers so you have a 3/6 = 1/2 probability of getting an even number
multiply both together for probability of 2 tails and an even number: 1/4 x 1/2 = 1/8 probability