Question
The average number of novels on historical, thriller and
fantasy in a library is 200, and the average number of novels on historical and fantasy is 190. If the number novels on fantasy is 15% less than the number of novels on thriller, then what is the number of novels on historical in the library?Solution
Let the number of novels on historical, thriller and fantasy be x, y and z respectively. Given, (x + y + z)/3 = 200 => x + y + z = 600 ….. (1) And, (x + z)/2 = 190 => x + z = 380 ….. (2) From equation 1 and 2 Number of novels on thriller = y = 220 Number of novels on fantasy = 0.85 × 220 = 187 Therefore, number of novels on historical = 600 – (220 + 187) = 193
Where is the footer area displayed in the Headout Master?
Which is a track change option in LibreOffice Writer?
The common name for the crime of stealing passwords is:
What type of malware locks a user's files and demands payment?
Which malware does not require host to spread
What type of system is supported by Linux?
Which of the following are possible signs of a malware infection?
Which protocol is related to e-commerce?
What is the purpose of data encryption in computer security?
Which command is used to remove a directory in UNIX?
