Question

One is asked to say a two -digit number .

a ) How many two digit numbers are there ?

b) What is the smallest possible sum of the digits ? c ) What is the largest possible sum of the digits ?

d) What is the probability of the sum of the digits being a prime ?​

Answer 1

Answer:

a, there are 90 2 digits numbers

b, smallest digit is 0

c, largest digit is 100 zeroes

d , 15