Question

a two digit number is chosen at random find the probability that the number is less than 20​

Answer 1

Answer:

10/89

Step-by-step explanation:

Total number of two digit numbers= 89

No of two digit numbers less than 20=10

Probability of getting a two digit number less than 20=10/89

Answer 2

The probability of the chosen two-digit number being less than 20 is $\frac{1}{9}$

Step-by-step explanation:

To find: The probability that the two-digit chosen number is less than 20.

The formula used:   Probability= $\frac{Total number of favorable outcome}{Total number of outcome}$

Given: A two-digit number is chosen.

The two-digit number starts from 10 to 99.

∴Total number of two-digit number= 90

The total number of two-digits number is the total number of outcomes.

The total number of favorable outcomes would be the two-digit numbers which are less than 20.

Therefore, the total number of favorable outcomes = 10

Now, we know, probability= $\frac{Total number of favorable outcomes}{Total number of outcomes}$

∴ probability= $\frac{10}{90}$

on dividing we get,

probability= $\frac{1}{9}$.

Therefore the probability that the chosen number is less than 20 and is a two-digit number is $\frac{1}{9}$.