Get Started
2220

Q: How many 6-digit even numbers can be formed from the digits 1, 2, 3, 4, 5, 6 and 7 so that the digits should not repeat and the second last digit is even ?

  • 1
    521
  • 2
    720
  • 3
    420
  • 4
    225
  • Show Answer
  • Workspace

Answer : 2. "720"
Explanation :

Answer: B) 720 Explanation: Let last digit is 2when second last digit is 4 remaining 4 digits can be filled in 120 ways, similarly second last digit is 6 remained 4 digits can be filled in 120 ways.so for last digit = 2, total numbers=240   Similarly for 4 and 6When last digit = 4, total no. of ways =240and last digit = 6, total no. of ways =240so total of 720 even numbers are possible.

Previous Next
Quantitative Aptitude GRE CAT IIT JEE Bank Exams GATE

The Most Comprehensive Exam Preparation Platform

Get the Examsbook Prep App Today