Request a call back

Join NOW to get access to exclusive study material for best results

# JEE Class main Answered

(A) 72 993. How many five-digit even numbers can be formed from the dights, 2,3,4,7 and 8, the digs are not repeated O (8) 36 © (c) 120 O (0) 54
Asked by abhishekssstays | 17 Dec, 2022, 05:00: PM
Expert Answer
To form a 5-digit number, let's fix 5 places.
The right most digit i.e. the digit at 1's place must be even since the number formed must be even.
So, there are 3 choices (2, 4 or 8) for the right most digit.
For the digit at ten's place, we left with 4 choices since the repetition is not allowed.
For the digit at hundred's place, we left with 3 choices.
For the digit at thousand's place, we left with 2 choices.
For the digit at ten thousand's place, we left with 1 choice.

Total number of ways of forming a 5-digit number with given numbers when the digits are not repeated
= 3 x 4 x 3 x 2 x 1
= 72
Answered by Renu Varma | 19 Dec, 2022, 09:08: AM
JEE main - Maths
Asked by shivanshij5 | 07 Feb, 2024, 11:16: AM
ANSWERED BY EXPERT
JEE main - Maths
Asked by adhyayanbabu | 04 Dec, 2023, 09:49: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by harshpunia109 | 26 Jun, 2023, 07:21: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by harshpunia109 | 25 Jun, 2023, 06:36: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by krrishgarg967 | 07 Jan, 2023, 11:31: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by abhishekssstays | 17 Dec, 2022, 05:00: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by varshitchouhan8 | 08 May, 2022, 08:48: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by amadhusudhan09 | 28 Oct, 2021, 07:20: PM
ANSWERED BY EXPERT
JEE main - Maths
Asked by panchalbhavesh372 | 16 May, 2021, 10:50: AM
ANSWERED BY EXPERT
JEE main - Maths
Asked by navyaankita121993 | 08 Feb, 2021, 08:40: PM
ANSWERED BY EXPERT