What I Can Do In a school canteen, the number of ball pens (X) sold every recess time varies from day to day. Past records indicate that the probability distribution of X is as follows: No. of Ball pens X ProbabilityP(X) 0.029 1 0.049 0.078 0.155 4 0.212 0.262 6 0.215 Questions: 1. What is the probability that exactly four ball pens are sold? 2. What is the probability that at least two ball pens are sold? 3. What is the probability that at least two but fewer than five ball pens are sold? 3.
What I Can Do In a school canteen, the number of ball pens (X) sold every recess time varies from day to day. Past records indicate that the probability distribution of X is as follows: No. of Ball pens X ProbabilityP(X) 0.029 1 0.049 0.078 0.155 4 0.212 0.262 6 0.215 Questions: 1. What is the probability that exactly four ball pens are sold? 2. What is the probability that at least two ball pens are sold? 3. What is the probability that at least two but fewer than five ball pens are sold? 3.
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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mind asking how do you get the answers? 1-4? i want to learn, Thanks!
Transcribed Image Text:What I Can Do
In a school canteen, the number of ball pens (X) sold every recess time
varies from day to day. Past records indicate that the probability distribution of X is
as follows:
No. of Ball pens X
ProbabilityP(X)
0.029
1
0.049
0.078
0.155
4
0.212
0.262
6
0.215
Questions:
1. What is the probability that exactly four ball pens are sold?
2. What is the probability that at least two ball pens are sold?
3. What is the probability that at least two but fewer than five ball pens are
sold?
4. What is the mean of the probability distribution? Use the given formula and
solve.
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