A special lottery is to be held to select a student who will live in the only deluxe room in a hostel. There are 100 Year-III, 150 Year-II and 200 Year-I students who applied.
Each Year-III's name is placed in the lottery 3 times; each Year-II's name, 2 times and Year-I's name, 1 time. What is the probability that a Year-III's name will be chosen?
A. $$\frac{{1}}{{8}}$$
B. $$\frac{{2}}{{9}}$$
C. $$\frac{{2}}{{7}}$$
D. $$\frac{{3}}{{8}}$$
Answer: Option D
Solution(By Examveda Team)
Total names in the lottery,$$\eqalign{ & = 3 \times 100 + 2 \times 150 + 200 \cr & = 800 \cr} $$
Number of Year-III's names,
$$\eqalign{ & = 3 \times 100 \cr & = 300 \cr} $$
Required probability,
$$\eqalign{ & = \frac{{300}}{{800}} \cr & = \frac{3}{8} \cr} $$
Related Questions on Probability
A. $$\frac{{1}}{{2}}$$
B. $$\frac{{2}}{{5}}$$
C. $$\frac{{8}}{{15}}$$
D. $$\frac{{9}}{{20}}$$
A. $$\frac{{10}}{{21}}$$
B. $$\frac{{11}}{{21}}$$
C. $$\frac{{2}}{{7}}$$
D. $$\frac{{5}}{{7}}$$
A. $$\frac{{1}}{{3}}$$
B. $$\frac{{3}}{{4}}$$
C. $$\frac{{7}}{{19}}$$
D. $$\frac{{8}}{{21}}$$
E. $$\frac{{9}}{{21}}$$
What is the probability of getting a sum 9 from two throws of a dice?
A. $$\frac{{1}}{{6}}$$
B. $$\frac{{1}}{{8}}$$
C. $$\frac{{1}}{{9}}$$
D. $$\frac{{1}}{{12}}$$
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