Let the x and y represent the tens digit and ones digit of a two digit number respectively. The sum of the digits of a two-digit
number is 9. If the digits are reversed, the new number is 27 more than the original number. What is the original number?
*Write a system of equations to describe the situation
*Find the solution to the system and answer the question.
*Write a system of equations to describe the situation
*Find the solution to the system and answer the question.
1 answer:
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Answer:
0.4%
Step-by-step explanation:
We have two independent events
- The athlete who is being tested for drugs actually is using steroids.
- The test went wrong indicating a false result.
The probability of 1) to happen is 0.04 because "4% of all registered athletes use steroids".
The probability of 2) ti happen is 0.1 because "The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users"
Then the probability of 1) and 2) to happen is given by
=0.4%