6 articles trouvés pour ce sujet.
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How many students have neither brown hair or hazel eyes? |
2013-01-20 |
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Julie pose la question :
There are 28 students in a class. 15 have brown hair, 17 have hazel eyes, and 10 have both. How many students have neither brown hair or hazel eyes?
Penny Nom lui répond. |
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Conditional probability |
2010-03-26 |
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Sandy pose la question :
In a certain school, it is known that 80% of the students use the internet for school projects, 60% use e-mail on a regular basis, and 90% use the internet for school projects or for e-mail on a regular basis. A student from this school is selected at random
Determine the probability that the student used e-mail, given that the student used the internet for school projects.
Sandy
Penny Nom lui répond. |
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All wiffs are miffs and all miffs are kiffs. |
2008-06-08 |
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Allison pose la question :
All wiffs are miffs. all miffs are kiffs. There are 25 wiffs. There are 76 kiffs. 33 kiffs are not miffs. How many miffs are not wiffs?
Penny Nom lui répond. |
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A health club |
2001-11-25 |
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Maria pose la question :
A health club with a membership of 650 people operates a running track and an indoor swimming pool. A survey of the membership indicates that 68% use the running track, 44% use the swimming pool, and 8% use neither. If a member is chosen at random, what is the prbability that the member uses: a) Both the track and the pool? b) Only the track?
Penny Nom lui répond. |
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Derfs, Enajs and Sivads |
2001-01-07 |
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John and Norman pose la question :
All Derfs are Enajs. One-third of all Enajs are Derfs. Half of all Sivads are Enajs. One Sivad is a Derf. Eight Sivads are Enajs. The number of Enajs is 90. How many Enajs are neither Derf nor Sivad?
Penny Nom lui répond. |
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100% on two tests |
2000-02-01 |
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Craig and Chelsea Bruzzone pose la question :
A class of 35 students took a math test and a science test. 12 students got 100% on the math test. 9 students got 100% on the science test. There were 19 students who made less than 100% on both tests. How many students made 100% on both tests?
Penny Nom lui répond. |
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