The number of ways of choosing 4 digits from 10 digits without replacement ( order is important) is
. This is the number of all possible permutations of choosing 4 from 10. The first 4 numbers of your phone number is a unique 4 digit number(4 different digits). The required probability is

Answer:
the correct answer would be 5
Step-by-step explanation:
when c=7, then we put that value in for c in the equation c-2
c-2
(7)-2
5
Answer:
−
7
i

Step-by-step explanation:
Answer:
9.8 miles per hour
3·60= 180+35=215 2107÷215=9.8