29-30 discrete math

29. How many 10 -bit strings begin with " 101 " or " 00 "? a. 27+28 b. 210+210 c. 2728 d. 210210 30. To select a stir-fry dish, a restaurant customer must select a type of rice, protein, and sauce. There are two types of rice, three proteins, and seven sauces. How many different varieties of stir-fry dishes are available? a. 2+37 b. 237 c. 2+3+7 d. 237