SOLUTION: Lisa has 9 rings in her jewelry box. 5 are gold and 4 are silver. If she randomly selects 3 rings to wear to a party,find each probability.
14. P ( all gold or all silver)
an
Algebra.Com
Question 753422: Lisa has 9 rings in her jewelry box. 5 are gold and 4 are silver. If she randomly selects 3 rings to wear to a party,find each probability.
14. P ( all gold or all silver)
and 16: P( at least 1 silver)
Can you show me the steps to complete this?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
Lisa has 9 rings in her jewelry box. 5 are gold and 4 are silver. If she randomly selects 3 rings to wear to a party,find each probability.
14. P ( all gold or all silver)
and 16: P( at least 1 silver)
14) what is P for all gold or all silver
P for all gold
first ring is gold, P is 5/9
second ring is gold, P is 4/8
third ring is gold, P is 3/7
P for all gold is (5/9)*(4/8)*(3/7)=.12 or 12%
P for all silver
first ring is silver, P is 4/9
second ring is silver, P is 3/8
third ring is silver, P is 2/7
P for all silver is (4/9)*(3/8)*(2/7)=.05 or 5%
16) P at least 1 is silver has the following possibilities, note that the probability of 1 silver is 4/9 and probability of 1 gold is 5/9
SGG = (4/9)(5/9)^2 = .14
GSG = (5/9)^2(4/9) = .14
GGS = (5/9)^2(4/9) = .14
SSG = (4/9)^2(5/9) = .11
SGS = (4/9)^2(5/9) = .11
GSS = (4/9)^2(5/9) = .11
SSS = (4/9)^3 = .09
now add all 7 probabilities and our answer is .84 or 84%
RELATED QUESTIONS
Lisa has nine rings in her jewelry box. Five are gold and four are silver. If she... (answered by stanbon)
Lisa has 9 rings in her jewlery box. Five are gold and 4 are silver. if she randomly... (answered by stanbon)
Please help with problem:
Lisa has 9 rings in her jewelry box. Five are gold and four... (answered by stanbon)
Juanita has 9 rings in her jewelry box. Five are gold and 4 are silver. If she randomly (answered by solver91311,edjones)
Elsa has 7 bracelets in her jewelry box. Four are gold and three are silver. If she... (answered by Fombitz)
Kacey is picking out jewelry to wear for school. She has 10 rings, 4 bracelets, and 4... (answered by Boreal)
A box A contains 4 gold rings and 3 diamond rings. A box B contains 2 gold rings and 5... (answered by ikleyn)
A jeweler has 5 rings, each weighing 12 g, made of an alloy of 5% silver and 95% gold.... (answered by Theo)
A jeweler has 2 rings, each weighing 24 g, made of an alloy of 5% silver and 95% gold.... (answered by stanbon)