Question

Assume that 3 digits are selected at random from the set {1,3,5,6,7,8} { 1 , 3 , 5 , 6 , 7 , 8 } and are arranged in random order. What is the probability that the resulting 3-digit number is less than 700?

Answer 1

Sample space is 36.so the probability must be 20/36.from three digits the maximum no.of number can be made is 6.