15. A person has in is bag 14 notes of Rs. 10 each, 9 notes of Rs. 5 each, 4 notes of Rs. 2 each and 7 notes of Re 1 each. In how many different ways can be contribute to a charitable find?
a) 599 b) 5999 c) 3528
d) 600

• As per the questions,
  14 notes of Rs10...so person can contribute
  Rs10 note in 14 ways.if person dont give Rs
  10 note then number of ways of
  contribution are 14+1=15.
  9 notes of Rs 5...so person can contribute
  Rs5 note in 9 ways.if person dont give Rs
  10 note then number of ways of
  contribution are 9+1=10.
  and so on..
  SO the number of ways can be contribute
  to a charitable fund
  15*10*5*8-1=5999(option b) answer
  here -1 is used because person must have
  to use atleast one note.
• 8 years agoHelpfull: Yes(33) No(11)
• I'll explain why rahul put n+1 becoz there is a rule in p&c that " total number of selection of zero or more things from n identical things=n+1"
  so if person dont give rs 10 note then number of ways of contribution are n+1 i.e 14+1=15
  same with other cases...
• 8 years agoHelpfull: Yes(9) No(1)
• (14+1)*(9+1)*(4+1)*(8+1)-1=5999
  he can give Rs10 notes in 14 ways and either he dont cont give Rs10 note
  So it is equal to =(14+1)
  same goes other Rs
  1 is subtracted because the person must have to use atleast one note.
  as said by RAHUL
  
• 8 years agoHelpfull: Yes(8) No(0)
• Mr.Rahul would u plzzz explain it
• 8 years agoHelpfull: Yes(2) No(0)
• =(15*5*10*8)-1
  =5999
• 8 years agoHelpfull: Yes(1) No(2)
• 14*9*4*7=3528
• 8 years agoHelpfull: Yes(1) No(3)
• rahul kumar can u plzz explain y we need to add +1 to find the ways
  as 10 notes is contributed in 14 ways na
• 8 years agoHelpfull: Yes(1) No(0)
• c)3528.....14*9*4*7
• 8 years agoHelpfull: Yes(1) No(2)
• 5999 is d ri8 answer
• 8 years agoHelpfull: Yes(1) No(1)
• plz expln it
• 8 years agoHelpfull: Yes(0) No(0)