A bag contains 3 yellow tennis balls and 4 green tennis balls. Gordy will select one tennis ball, put it in his pocket, and then select a second tennis ball.
Which expression gives the probability that he will select two green tennis balls?
A.
B.
C.
D.
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OpenStudy (anonymous):
wait
OpenStudy (anonymous):
A. 4/7 . 3/6
B. 4/7 . 4/6
C. 4/7 . 3/7
D. 4/7 . 4/7
OpenStudy (anonymous):
c
OpenStudy (anonymous):
@uri
OpenStudy (anonymous):
@triciaal
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OpenStudy (anonymous):
@TrojanPoem
OpenStudy (anonymous):
@LegendarySadist
OpenStudy (anonymous):
c
OpenStudy (anonymous):
i will medal who answers first and says it is correct
OpenStudy (triciaal):
Event A and event B multiply the probabilities
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OpenStudy (anonymous):
12
OpenStudy (triciaal):
4/7 * 3/6. Since not replaced
OpenStudy (anonymous):
4/7 . 3/7
OpenStudy (anonymous):
is the answer
OpenStudy (anonymous):
am i correct
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OpenStudy (anonymous):
or wrong
OpenStudy (triciaal):
Read my responses
OpenStudy (anonymous):
they r out of 7
OpenStudy (anonymous):
i don't get it
OpenStudy (anonymous):
why 3/6 not 3/7
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OpenStudy (triciaal):
He kept the 1st so the 2nd is out of 6
OpenStudy (anonymous):
o k
OpenStudy (anonymous):
then it is 4/7 . 3/6
OpenStudy (anonymous):
is it
OpenStudy (anonymous):
Answer A
4/7 * 3/6
There are 3 + 4 = 7 tennis balls to start with and 4 of them are green. Therefore the probability of the first being green = 4/7.
Once he puts this ball in his ocket there are only 6 balls left to select from and now only three are green. Remember the other green ball is in his pocket. Therefore the probability that the second is green also = 3/6.
Finally as you are asked the probability that BOTH are green, multiply the individual probabilities together
4/7 * 3/6
= Answer A
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OpenStudy (triciaal):
Yes. ( Use * for multiplication )
OpenStudy (anonymous):
one more
OpenStudy (anonymous):
A volleyball team had 6 boys and 5 girls on it. The team needed 2 equipment managers. The coach selected 1 player at random to be an equipment manager and then selected 1 of the remaining players at random to be the other equipment manager.
What is the probability that both equipment managers were girls? Express your answer in simplest form
OpenStudy (anonymous):
2/11
OpenStudy (anonymous):
2/11
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OpenStudy (anonymous):
2/11 is correct
OpenStudy (anonymous):
stop searching it up u r in 6th
OpenStudy (triciaal):
When a question is posted anyone can answer.
You do not decide who answers!!
I do not doubt that you can answer or how good you are.
OpenStudy (anonymous):
you stay an hour just to type that wat kind of Q u r
OpenStudy (anonymous):
is it 2/!!
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OpenStudy (anonymous):
weeeee know
OpenStudy (anonymous):
i unfaned you
OpenStudy (anonymous):
both ya
OpenStudy (anonymous):
no
OpenStudy (anonymous):
u turn
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