Asecurity alarm requires a four digit code. the code can use 0-9 and the digits cannot be repeated. what is the approximate probability that the code only contains odd number

0.02381

Step-by-step explanation:

Given: The number of digits from which a security code is made (0-9) = 10

The number of odd digits (1, 3, 5, 7, 9 )= 5

By using Permutations , the number of ways to make a four digit number such that no digit is repeated :-

The number total number of ways of making four digit number from the 10 digits such that no digit is repeated:-

The probability that the code only contains odd number is given by :-

Hence, the approximate probability that the code only contains odd number = 0.02381

answer: 40.95

step-by-step explanation:

1/4 because there is 4 grades.