Answer:
0.050328
Step-by-step explanation:
Given that there are 10 coins, out of which 9 are fair and one is double headed.
P(selecting fair coin) = 0.9 and P(selecting double headed coin) = 0.1
P(H/fair coin)= 0.5 and P(H/doube headed ) = 1
Probability of getting in 1 toss head = Prob of selecting fair coin and getting head+ Prob of selecting double headed and getting head
=
This will be constant p for 10 trials going to be done because coin is replaced each time.
Also there are only two outcomes
X no of heads in 5 flips is Binomial with (5, 0.55)
P(x=5) = Reqd probability
=
Answer:
C. if not c D.
<em>good luck, i hope this helps :)</em>
<em>(also you might get more help if you post in the english category not math)</em>
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This could be rephrased as:
You start with 100 grams of a substance. One year later you have 70 grams. What is the half-life?
We need this formula:
half-life = (time * natural log (2)) / natural log (beginning amount / ending amt)
half-life = (1 year * .69315) / natural log (100 / 70)
half-life = (.69315) / 0.35667494396
half-life = 1.9433661145 years
Rounding to nearest year half-life = 2 years
Sourse: https://www.1728.org/halflif2.htm
(See problem 3)
Answer:
x = 50
Step-by-step explanation:
Given
(x + 10) + (2x + 20) = 180 ( remove the parenthesis )
x + 10 + 2x + 20 = 180, that is
3x + 30 = 180 ( subtract 30 from both sides )
3x = 150 ( divide both sides by 3 )
x = 50
Answer:
Step-by-step explanation:
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