Question 474496: a card is randomly selected from a standard deck of 52 cards. What is the probability that it is an 8 or a king?
When two fair coins are tossed, there are four possible outcomes.
What is the probability that two heads are tossed?
10.
If P(A) = 0.28, P(B) = 0.41, and P(A and B) = 0.16, what is P(A or B)?
If P(A) = 0.7, P(B) = 0.4, and P(A or B) = 0.8, what is P(A and B)?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a card is randomly selected from a standard deck of 52 cards. What is the probability that it is an 8 or a king?
--
There are 4 8's and 4 kings.
P(8 or king) = 8/52 = 2/13
--------------------------------
.
When two fair coins are tossed, there are four possible outcomes. What is the probability that two heads are tossed?
Binomial Problem with n = 4 and p = 1/2
------------------------------------------
Ans: 4C2(1/2)^2*(1/2)^2 = 6*(1/16) = 3/8
==============
If P(A) = 0.28, P(B) = 0.41, and P(A and B) = 0.16, what is P(A or B)?
P(A or B) = P(A)+P(B)-P(A and B)
= 0.28 + 0.41 - 0.16
= 0.53
----------------------------
If P(A) = 0.7, P(B) = 0.4, and P(A or B) = 0.8, what is P(A and B)?
P(A and B) = 0.7 + 0.4 - 0.8
P(A and B) = 0.3
==============================
Cheers,
Stan H.
===========
|
|
|
