Mathematics, 26.03.2020 17:44 dda69
A shopping mall has three automated teller machines (ATMs). Because the machines receive heavy use, they sometimes stop working and need to be repaired. Let the random variable X represent the number of ATMs that are working when the mall opens on a randomly selected day. The table shows the probability distribution of X.
Number of ATMs working when the mall opens:
0 1 2 3
Probability 0.15 0.21 0.40 0.24
(a) What is the probability that at least one ATM is working when the mall opens?
(b) What is the expected value of the number of ATMs that are working when the mall opens?
(c) What is the probability that all three ATMs are working when the mall opens, given that at least one ATM is working?
(d) Given that at least one ATM is working when the mall opens, would the expected value of the number of
ATMs that are working be less than, equal to, or greater than the expected value from part (b) ? Explain.
Answers: 3
Mathematics, 21.06.2019 17:00
How to solve a simultaneous equation involved with fractions?
Answers: 1
Mathematics, 21.06.2019 18:30
The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy β 15x = 125 b) 5xy + 15x = 125 c) 15x2 β 5xy = 125 d) 15x2 + 5xy = 125
Answers: 2
Mathematics, 21.06.2019 19:30
Evaluate the expression for the given value of the variable. β£-4b-8β£+β£-1-b^2 β£+2b^3 ; b=-2
Answers: 2
Mathematics, 21.06.2019 20:30
Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?
Answers: 2
A shopping mall has three automated teller machines (ATMs). Because the machines receive heavy use,...
Mathematics, 06.04.2020 01:47
Mathematics, 06.04.2020 01:47
Mathematics, 06.04.2020 01:47
Mathematics, 06.04.2020 01:47
History, 06.04.2020 01:47
Chemistry, 06.04.2020 01:47
Computers and Technology, 06.04.2020 01:47
Mathematics, 06.04.2020 01:47
English, 06.04.2020 01:47
Physics, 06.04.2020 01:47
Physics, 06.04.2020 01:47
History, 06.04.2020 01:47
Mathematics, 06.04.2020 01:47
Physics, 06.04.2020 01:47
Chemistry, 06.04.2020 01:47