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April 18, 2015

April 18, 2015

Posted by **Dharmenra** on Friday, October 15, 2010 at 6:10am.

a. He failed in Mathematics only

b. He passed in Statistics, if it is known that he has failed in Mathematics

- IGNOU probability -
**drwls**, Friday, October 15, 2010 at 6:22amMake a Venn diagram.

5% fail math only

25% fail both

10% fail stats only

60% pass both.

Of the 30% (of all students) who failed math, 5/6 of that group (25% of all students)failed stats also. That is a conditional probability of 83.3%. Only 16.7% of the math-failing group pass stats.

- IGNOU probability -
**Amit**, Sunday, October 24, 2010 at 11:04amas u hve explained everything but i didn't get that 45% failed in atleast 1 of the subject but if we add

(5+25+10)% then we get only 40% which should be 45%.....plz explain

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