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Q1) If 25 tickets are sold and 2 prizes are to be awarded, determine the probability that one person will win both prizes if that person purchases exactly 2 tickets.
i) 1/300
ii) 1/600
iii) 1/700
iv) 1/2300
Q2) Determine mean of distribution shown.
x
1
2
P(x)
0.31
0.69
i) 0.96
ii) 1.42
iii) 1.18
iv) 1.69
Q3) Give the mean of following probability distribution?
0.20
0.10
3
0.35
4
0.05
5
0.30
i) 1.20
ii) 1.46
iii) 3.15
iv) 2.13
This distribution is positively skewed. The standard deviation of the population is not known.
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