House numbers along the street consist of two-digit numbers. each house number it’s made up of nonzero digits, and no digit in a house number is repeated. event a is defined as choosing 6 as the first digit, and event b is defined as choosing a number less than 4 as the second digit. a house number along the street is picked at random, with each number being equally likely a no repeated digits in a number, what is p(a and b) expressed in simplest form? a. 1/24 b. 1/9 c. 3/8 d. 1/2