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Earn +20 ptsQ: Probability lesson represent outcomes 4th grade math?
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Continue Learning about Statistics
If you randomly pick a date in April how many equally likely outcomes are there?
If you randomly pick a date in April how many equally likely outcomes are there?
In a third grade class containing 13 girls and 7 boys Two students are randomly selected to give out homework What is the probability that both students are girls?
13 out of 20
A student takes a 10 question true or false exam and guesses on each question Find the probability of passing if the lowest passing grade is 6 correct out of 10?
5 out of 10
In a third grade class containing 12 girls and 10 boys Two students are selected randomly to give out papers What is the probability that the second student chosen is a boy if the first was a girl?
4 in 7 chance
A test consists of 10 truefalse questions To pass the test a student must answer at least 7 questions correctly on a true-false exam what is the probability that he or she get them all right?
The probability of getting all 10 questions right is, P(10) =(1/2)10 =0.0009765...9 questions right, P(9) =10C9 ∙(1/2)10 =10∙(1/2)10 ~ 0.009765...8 questions right, P(8) =10C8 ∙(1/2)10 ~ 45∙(1/2)10 ~ 0.043945...7 questions right, P(7) =10C7 ∙(1/2)10 ~ 120∙(1/2)10 ~ 0.1171875...The probability of passing the test with any of the grade is the sum of all theabove; P(passing)~ 0.1719 ~ 17.2%
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