Question

One is asked to say a two digit number. What is the probability that of being both the digits same?

Answer 1

Answer:

1/10

Step-by-step explanation:

The two digit numbers with both the digits same are 11, 22, 33, 44, 55, 66, 77, 88 and 99

∴total no: of two digit numbers having both digits same = 9

also, total no: of two digit numbers = 90

∴probability of getting a two digit number with both the digit same =

     total no: of two digit number having both digit same

                     total no: of two digit numbers

   = 9/90  = 1/10

HOPE THIS HELPS.....

Answer 2

Given: One is asked to say a two digit number.

To find: The probability of both the digits being same.

Solution:

• Probability provides us the chances of the occurrence of an event.
• It is the number of favourable outcomes divided by the number of total possible outcomes.
• In this case, number of favourable outcomes is 9, since there are 9 such two-digit numbers whose both the digits are same.
• And, the number of total possible outcomes is 90, since there are 90 two-digit numbers.
• So the probability is given by,

        $\frac{9}{90} = \frac{1}{10}$

Therefore, 1/10 is the probability of both the digits being same.