One is asked to say a two-digit number. What is the probability of it being a multiple of 9?
A1/10
B2/10
C1/9
D2/9
Answer:
C. 1/9
Read Explanation:
The total number of two-digit numbers is 99-10+1=90.
The two-digit multiples of 9 are 8,27,36,45,54,63,72,81,90,99, There are 10 such numbers.
Probability = number of multiples of 9/total number of two-digit number
= 10/90
= 1/9
