Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A seven digit number is formed using digits 3,3,4,4,4,5,5. The probability that number so formed is divisible by 2, is: Option: 1

A seven digit number is formed using digits 3,3,4,4,4,5,5. The probability that number so formed is divisible by 2, is:
Option: 1 6/7
Option: 2 1/7
Option: 3 3/7
Option: 4 4/7

Answers (1)

best_answer

Digits = 3, 3, 4, 4, 4, 5, 5

\text { Total } 7 \text { digit numbers }=\frac{7 !}{2 ! 2 ! 3 !}

Number of 7 digit number divisible by 2, so the last digit must be even

last digit = 4

Now 7 digit numbers which is divisible by 2 =\frac{6 !}{2 ! 2 ! 2 !}

\text { Required probability }=\frac{\frac{6 !}{2 ! 2 ! 2 !}}{\frac{7 !}{3 ! 2 ! 2 !}}=\frac{3}{7}

 

 

Posted by

himanshu.meshram

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2024 session 2 final answer key soon at jeemain.nta.ac.in; result on April 25
anam-khan

JEE Main 2024 Session 2: Last day to challenge answer key today
anam-khan

BTech admission 2024 without JEE; top government engineering colleges, upcoming entrance exams

Latest Question