Question

Answer the following:
The two - digit number formed form the digits 2, 3, 5, 7, 9 without repetition.
Find the probability of the event the number so formed is an odd number
(ii) the two-digit number so formed is multiple of S.​

Answer 1

$\huge \blue✢ \red{ \tt \underline{ Solution : - }}$

we need to find out that how many two - digit formed from to the digits 2 , 3 ,5 ,7 ,9 without repeating the digits.

• Number of digits = 5
• we need formed 2 - digit numbers

∆ 1st vacant can be filled by 5 ways

∆ 2nd vacant can be filled by remain 4 ways

So,

Number of two digit numbers formed :

= 5 × 4

= 20