Question

A owes B Rs 50. He agrees to pay B over a number of consecutive day starting on a Monday, paying single note of Rs 10 or Rs 20 on each day. In how many different ways can A repay B. (Two ways are said to be different if at least one day, a note of a different denomination is given)
A. 8
B. 7
C. 6
D. 5; A owes B Rs 50. He agrees to pay B over a number of consecutive day starting on a Monday, paying single note of Rs 10 or Rs 20 on each day. In how many different ways can A repay B. (Two ways are said to be different if at least one day, a note of a different denomination is given); A. 8; B. 7; C. 6; D. 5

Answer 1

Answer:

Option A

8 ways

Step-by-step explanation:

50 Rs with the help of notes Rs 10 & Rs 20 can be given

Either  10 * 5 = 50

or 10* 3 + 20 *1 = 50

or 10*1 + 20*2 = 50

10* 5 = 50  is one way as all the notes used are on rs 10 only  - 1 Way

10*3 + 20*1 = 50 there are total 4 notes to pay and rs 20 note can be given on any of  1st & 4th day Rest notes are of Rs 10 .  - 4 ways

10*1 + 20* 2 = 50 There are total 3 notes so Rs 10 can be given on  any of days from 1st to 3rd , Rest notes are of rs 20 = 3 Ways

Total = 1 + 3 + 4 = 8 Ways

Option A  - 8