The odds of choosing one black ball from an urn are 7 to 13. what is the probability of getting a black ball?
2 answers:
Answer:
Step-by-step explanation:
The odds for an event is basically the ratio of the favorable outcomes to the unfavorable outcomes.
Given : The odds of choosing one black ball from an urn are 7 to 13.
i.e. favorable outcomes for getting black ball = 7
i.e. unfavorable outcomes for getting black ball = 13
Now , Total outcomes = favorable outcomes+ unfavorable outcomes
=7+13=20
Then, the probability of getting a black ball
Hence, the required probability
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Answer:
The experimental probability of rolling an odd number is 60%, which is 10% more than the theoretical probability.
Step-by-step explanation:
The complete question is:
Type the correct answer in each box. Use numerals instead of words. If necessary, use/ for the fraction bar(s).
A special 8-sided die is marked with the numbers 1 to 8. It is rolled 20 times with these outcomes.
3, 4, 5, 2, 7, 1, 3, 7, 2, 6, 2, 1, 7, 3, 6, 1, 8, 3, 5, 6
The experimental probability of rolling an odd number is _%, which is _% more than the theoretical probability.
Solution:
The possible outcomes of rolling an 8-sided die are:
S = {1, 2, 3, 4, 5, 6, 7, 8}
The odd numbers are:
Odd = {1, 3, 5, 7} = 4 outcomes
The theoretical probability of rolling an odd number is:
Now from the given 20 outcomes the odd values are:
Odd = {3, 5, 7, 1, 3, 7, 1, 7, 3, 1, 3, 5} = 12 outcomes
Compute the experimental probability of rolling an odd number as follows:
Thus, the experimental probability of rolling an odd number is 60%, which is 10% more than the theoretical probability.