SOLUTION: Could you explain everything that you do? Numbers 1-10 are written on cards and placed in a bag. Find each probability. 7. choosing at lease one even number when selecting 2 card

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Question 182131This question is from textbook Compound Events
: Could you explain everything that you do?
Numbers 1-10 are written on cards and placed in a bag. Find each probability.
7. choosing at lease one even number when selecting 2 cards from the bag
Five years after 650 high school senior graduated, 400 had a college degree and 310 were married. Half of the students with a college degree were married.
8. What is the probability that a student has a college degree or is married?
Please answer me as soon as you could.
Thank you for your help. This question is from textbook Compound Events

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
Numbers 1-10 are written on cards and placed in a bag. Find each probability.
7. choosing at lease one even number when selecting 2 cards from the bag
P(getting one even) = 1- P[getting 2 even or getting 0 even]
= 1 - P(getting 2 even) - P(getting 2 odd)
= 1 - 5C2/10C2 - 5C2/10C2
= 1 - 10/45 - 10/45
= 25/45
= 5/9
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Five years after 650 high school senior graduated, 400 had a college degree and 310 were married. Half of the students with a college degree were married.
8. What is the probability that a student has a college degree or is married?
P(cd or married) = P(cd) + P(married) - P(cd and married)
= 400/650 + 310/650 - 200/650
= 510/650
= 51/65
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Cheers,
Stan H.