Join now for JEE/NEET and also prepare for Boards Become an IITian/Doctor with FREE iCAT Scholarship | Date: 25 April, 2021 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
+91-120-4616500
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
1) In how many ways we can give 5 apples ,4mangoes and 3 oranges to three persons if each may recieve none,one or more?
2)A number lock has 4 dials each dial has the digits 0,1,2,.................,9.What is the maximum unsuccessful attempts to open the lock?
Dear Vanya
let 1st person get x1 appple ,x2 mangoes , x3 oranges
2nd person get y1 appple ,y2 mangoes , y3 oranges
3rd person get z1 appple ,z2 mangoes , z3 oranges
so x1 +y1+ z1=5 ...........1
x2 +y2 +z2 =4...............2
x3+y3+z3 =3................3
where x1,x2,x3,y1,y2,y3.z1.z2.z3 ≥ 0
integral solution of equation 1st
5+3-1C3-1 =7C2
integral solution of equation 2nd
4+3-1C3-1 =6C2
integral solution of equation 3rd
3+3-1C3-1 =5C2
so total ways =7C26C25C2
2 question
each dial has 10 possibility
so total possibility=10*10*10*10
out of this one is succecful attemmpt
so mas unsuccesful attempt=9999
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 !