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- anonymous

Is it A?
Determine the sum of the given probabilities. Are the events complementary?
P(gold) = 4/11; P(silver) = 7/11
A.
1 The events are complementary.
B.
1 The events are not complementary.
C.
1/2 The events are complementary.
D.
1/2 The events are not complementary.

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- anonymous

- katieb

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- anonymous

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- AravindG

Do you know when probabilities become complementary?

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- anonymous

Complementary events are like 1/2 or like flipping a coin and getting heads or tails, rite?

- amistre64

almost, two sets are complementary when they add up to the entire sample space of events
say the universal set is: U={a,b,c,d,e}
let setA = {a,b,c} the complement of A is the set U-A = {d,e}
A combined with its complement form the Universal set.

- amistre64

In probability, the universal set of the sample space, is 1
so the probability of the complements added up will have to equal what?

- anonymous

I dunno.
I'm sorry, but I don't get most of what you're trying to say.

- amistre64

what is the probability of an entire sample space?

- anonymous

That would be...1, rite?

- amistre64

yes
and complements are events that are mutually exclusive (what does this mean?) that add up to the entire sample space.

- anonymous

Oh okie

- amistre64

and yes, its A ... 4/11 + 7/11 = 1, and gold cannot be silver so they are mutually exclusive.

- anonymous

Thnx for helping me :)

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