Join now for JEE/NEET and also prepare for Boards Class 10 Boards Cancelled! What to do next ? Ask our Experts in a Free Counseling Session Now ! Register Now
Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-1023-196
+91 7353221155
CART 0
Use Coupon: CART20 and get 20% off on all online Study Material
Welcome User
OR
LOGIN
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
how many numbers less than 4321, can be formed from the digits 1,2,3,4,if repetition is allowed?
The answer is 340.
232
when the thousands place is fixed as 1 , then the number formed is 1... with repitition allowed, the three places can be filled in 4*4*4= 64 wayssimilarly, fixing 2 at the thousands place, we have 4*4*4 =64 ways of forming a four digit - number also fixing 3 at the thousands place we have 64 four-digit numbers fixing 4 at the thousands place, we can have the hundreds place in 3 ways , but the tens place can be filled only in 1 way because we cannot have 2 or 3 or 4 at the tens position as per the condition given . and the units place can be filled in 4 ways so, total number of ways of forming a four digit number under the condition given to us =64 +64+64+ 3*4 = 204 ways but we can form 1 digit number in 4 ways, two digit numbers in 4*4=16 ways, three digit numbers in 4*4*4 = 64 ways, so total numbers we can form = 204+4+16+64
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !