Question

Asked Oct 16, 2019

Jay can remember only the area code and the first 3 digits of his friend's phone number. He also knows that the number has 7 digits (not including the area code) and the last digit is not a zero. If Jay were to dial all of the possible numbers and it takes him 21 seconds to try each one, how many hours would it take him (in total) to try each possibility?

Step 1

The total number of 4 digits and last digit is not a zero is,

1st digit is 0 to 9

2st digit is 0 to 9

3st digit is 0 to 9

Last digit is 1 to 9

The total number of 4 digits is,

Step 2

The number of hours would it take him (in ...

Tagged in

Q: Which of the following is not a possible linear correlation coefficientvalue?A) r = 0.327 B) r = -0....

A: The linear correlation coefficient represents the strength of the variables and direction of the lin...

Q: According to a study done by UCB students, the height for Martian adult males is normally distribute...

A: C.The middle 40% of Martian heights lie between what two numbers is obtained below:From the informat...

Q: In a random sample of 900 individuals, the proportion of regular vitamin users is found to be 0.20. ...

A: It is given that the two-sided 95% confidence interval is estimated for proportion.

Q: An ANOVA is used to evaluate the mean differences among three treatment conditions with a sample of ...

A: It is given that the number of treatments, K is 3.Total number of observations is (12 x 3) = 36.

Q: The probability that a randomly selected 40-year old female will live to be 41-year-old is 0.9986 ac...

A: 1.The probability that two randomly selected 40 year old females will live to be 41 years old is obt...

Q: At a local community college, five statistics classes are randomly selected out of 20 and all of the...

A: In the given situation, we need to identify which sampling method is used.

Q: Saved uiz Recent crime reports indicate that 5.7 motor vehicle thefts occur each minute in the Unite...

A: As per the question,Let X represents no of thefts occur in a minuteX follows poisson distribution wi...

Q: A basketball player has a free throw percentage of 93%. What is the probability she misses at least ...

A: The probability of she misses at least one of his next 27 free throws is obtained below:Let X be the...

Q: Using the below table: A1 A2 B1 0.4 0.3 B2 0.2 0.1 Compute P(A1 ...

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If y...