At the turn of the century, fourteen thousand, seven items were on the proscribed list. Thirty years later only seven thousand, nine hundred forty-two remained on this list. How many had been removed?

Q: serial number on an implanted medical device consists of 3 letters followed by 4 digits. The first…

A: Basic concepts of probability are used.

Q: A telephone number consists of 10 digits: 3 digit area code followed by 7 digit number. How many…

A: For area code , possible first digits are 1 to 9 and for the other number ,remaining digits are 0-9…

Q: How many 4-digit numbers are there?   And if repetition of digits is not allowed?

A: Given that n= number from 1 to 9 = 9 r = 4 ( since we have to take 4 digit number)

Q: The employees of a company are given a 4-digit identification number. How many different numbers are…

A: GivenThe employees of a company are given a 4-digit identification numberNo.of digits from 0-9=10

Q: How many license plates can be made using two letters followed by four digits (0-9), allowing…

A: From this given information, license plates can be made using two letters followed by four digits…

Q: If the population in Germany is 8,000,000 and there are 123,946,567 possible numbers, how many phone…

A: Given Data: The population in Germany is: P=8000000 The total possible numbers is: N=123946567

Q: A survey of 1700 teens showed that 1140 read Marvel comics, 670 read DC comics, and 160 do not read…

A: The total number of teens is 1700.The number of teens who read Marvel comics is .The number of teens…

Q: A license plate is to have the following form: three letters followed by three numbers. An example…

A: There are 26 letters (A-Z) and 10 numbers (0-9) We can pick each letter in 26 ways and we can pick…

Q: In a survey of 1000 students it was found that 840 own a cell phone, 450 own an MP3 player and 370…

A:

Q: The English alphabet contains 21 consonants and 5vowels. How many word of length 4 can you write all…

A:

Q: A state has license plates that consist of 2 letters followed by 3 numbers and each letter and…

A:

Q: Assume that there are 325 million people in the United States. If 128,978 people died of a stroke in…

A: Total population = 325 million                          = 325000000Let x be the number of people who…

Q: How many different license plates are possible if 2 uppercase letters are followed by 4 digits and…

A: A number plate consist of 2 uppercase letters followed by 4 digits, in which first digit cannot be…

Q: In 2011 there were approximately 5 billion pennies minted. If all of these pennies were placed in a…

A: This is a problem of conversion and counting. Interestingly reducing dimensions is another aspect of…

Q: A certain type of collectible toy comes in 13 different categories and there is an equal number of…

A: total number of toys 195the number of categories 13