PLEASE HELP ASAP ILL MARK BRAINLEST
2 answers:
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Answer:
a = 15
Step-by-step explanation:
Substitute b = 12 , a = 9 into the equation
12 =
12 = ← square both sides
144 = a² - 81 ( add 81 to both sides )
225 = a² ( take square root of both sides )
± = a , then
a = ± 15
a > 0 , so a = 15
Answer:
The required probability (P) is :
Step-by-step explanation:
Probability of meeting random person who has same birthday as you =
Probability of meeting random person who do not has same birthday as you =
Now, to find the required probability that the 25th person you meet is the first person who has the same birthday as you = (Probability that the first 24 persons we meet did not have same birthday as you) × (Probability that the first 25 persons we meet has same birthday as you)
Therefore,