What is the probability of a randomly selected person having high blood pressure?
December 3rd, 2011 | by admin |linda asked:
The probability that a randomly selected person has high blood pressure (the event H) is P(H) = .3 and the probability that a randomly selected person is a runner (the event R) is P(R) = .3. The probability that a randomly selected person has high blood pressure and is a runner is .2. Find the probability that a randomly selected person either has high blood pressure or is a runner or both.
The probability that a randomly selected person has high blood pressure (the event H) is P(H) = .3 and the probability that a randomly selected person is a runner (the event R) is P(R) = .3. The probability that a randomly selected person has high blood pressure and is a runner is .2. Find the probability that a randomly selected person either has high blood pressure or is a runner or both.
1) .6
2) .7
3) .8
4) .3
5) .4
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No Responses to “What is the probability of a randomly selected person having high blood pressure?”
By M3 on Dec 6, 2011 | Reply
draw a venn diagram for clearer understanding.
using the formula, we get
P[H or R] = P[H] + P[R] - P[H & R]
= .3 + .3 - .2 = .4
ans : [ 5 ] .4
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