Probability Part 1

An unbiased coin is tossed. If the outcome isa head then a pair of unbiased dice is rolled andthe sum of the numbers obtained on them isnoted. If the toss of the coin results in tail thena card from a well-shuffled pack of nine cardsnumbered 1,2,3,...,9 is randomly picked and thenumber on the card is noted. The probabilitythat the noted number is either 7 or 8 is :