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Usimov [2.4K]
3 years ago
9

Please helpppppp In exercises 3-6, events A and B are disjoint. Find P(A or B).

Mathematics
1 answer:
bekas [8.4K]3 years ago
3 0

Problem 3

Disjoint events are two (or more) events that cannot happen at the same time. An example would be flipping heads and tails at the same time with the same coin. Another example is selecting an ace of spades and selecting an ace of diamonds, when you only select one card.

In general notation, P(A and B) = 0 if and only if A and B are disjoint.

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 0.3 + 0.1 - 0

<h3>P(A or B) = 0.4</h3>

=========================================

Problem 5

Same idea, but different numbers

P(A or B) = P(A) + P(B) - P(A and B)

P(A or B) = 1/3 + 1/4 - 0

P(A or B) = 4/12 + 3/12 - 0

<h3>P(A or B) = 7/12</h3>
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Find the amount and present value of 10 quarterly payments of $ 1500, if the interest rate is 25% compounded each month.
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The present value is found by

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at the beginning of the school year Anderson Middle School had 480 students at the end of the year it had 504 students what is t
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Answer:

The number of enrollments increased by 5%.

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3 years ago
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