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CBSE Class 9 Answered

A no. is chosen at random, find the probability that the digit at the unit’s place is: 1. 9 2. a non- zero multiple of 3 3. a non- zero even no. 4. an odd no.
Asked by jovanjotsingh950 | 07 Jan, 2022, 08:33: PM
answered-by-expert Expert Answer
Units place can be filled with the numbers 0, 1, 2, 3, ..., 9
 
1.
Probability that the unit's place has 9 is given by P(A) = 1/10
 
2.
Non-zeroe multiples of 3 are 3, 6, 9, 12, ...
Probability that the unit's place has a non-zero multiple of 3 is given by P(B) = 3/10
 
3. 
Non-zero even numbers are 2, 4, 6, 8, 10, ...
Probability that the unit's place has a non-zero even number is given by P(C) = 4/10 = 2/5
 
4. 
The odd numbers are 1, 3, 5, 7, 9, 11, ...
Probability that the unit's place has an odd number is given by P(D) = 5/10 = 1/2
Answered by Renu Varma | 11 Jan, 2022, 10:21: AM

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