Your dad is 73.5 inches tall. You are 2.5 inches shorter than your dad. Your mom is 3.25 inches shorter than you. How tall is yo
2 answers:
Answer: My mom's height is 67.75 inches.
Step-by-step explanation: Given that my dad is 73.5 inches, I am 2.5 inches shorter than my dad. My mom is 3.25 inches shorter than me.
We are to find the height of the mom.
Since I am 2.5 inches shorter than my dad, so my height will be
Now, my mom is 3.25 inches shorter than me, so my mom's height is
Thus, my mom is 67.75 inches tall.
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Answer:
There is a 28.57% probability that a randomly selected participant who died by the end of the study was a non-smoker.
Step-by-step explanation:
We have the following probabilities:
A 15% probability that a participant is classified as a heavy smoker.
A 25% probability that a participant is classified as a light smoker.
A 100% - 25% - 15% = 60% probability that a participant is classified as a non smoker.
A x% probability that a non smoker dies.
A 3x% probability that a light smoker dies.
A 5x% probability that a heavy smoker dies.
This can be formulated as the following problem:
What is the probability of B happening, knowing that A has happened.
It can be calculated by the following formula
Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.
This problem is:
What is the probability of the participant being a non-smoker, given that he died?
P(B) is the probability that the participant is a non smoker. So
P(A/B) is the probability that the participant dies, given that he is a non smoker. So:
P(A) is the probability that the participant dies:
is the probability that a heavy smoker is selected and that he dies. So:
is the probability that a light smoker is selected and that he dies. So:
is the probability that a non-smoker is selected and that he dies. So:
The probability that a participant dies is:
The probability of the participant being a non-smoker, given that he died, is:
There is a 28.57% probability that a randomly selected participant who died by the end of the study was a non-smoker.