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:its easy it the first one you had posted
Step-by-step explanation:
Answer: 6x^2
Step-by-step explanation:
The area of a triangle is 1/2bh
Thus, simply multiply 2x*3x = 6x^2
Hope it helps <3
Answer:
Gabriel Mouton was a church vicar who lived in Lyons, France, who is considered to be the creator of the metric stystem. he created it in 1970
Step-by-step explanation: