16. Class A has 18 boys and 17 girls and Class B has 14
boys and 22 girls. A student from Class A is
transferred to Class B. The teacher selects a
student at random from the extended Class B. Find
the probability that the student selected is
(i) the student who was initially from Class A,
(ii) a boy
Answer to part ii is 508/1295. How??
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Answer:
Answer:
total number of student in class A=17+18=35
total number of student in class B=14+22=36
total nunber of boys=18+14=32
total numbers of girls=17+22=39
total number of student altogether=35+36=71
qus i)
p(e) = \frac{number \: of \: favourable \: outcomes}{total \: number \: of \: outcomes}p(e)=
totalnumberofoutcomes
numberoffavourableoutcomes
p(e) = \frac{35}{71}p(e)=
71
35
ii)
p(e) = \frac{32}{71}p(e)=
71
32
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