Question

A four-digit number is formed by using the digits 1, 2, 4, 8 and 9 without repetition. If one number is selected from those numbers then what is the probability that it will be an odd number?

• A. $1/5$
• B. $2/5$
• C. $3/5$
• D. $4/5$

Answer 1

The correct option is B $2/5$

A number can be odd or even depending on the last digit.
So, the last digit can be any of the given $5$ numbers.
Also, the number will be odd if the last digit is $1$ or $9$.
So, probability of getting an odd number $=\frac{2}{5}$