Question

A person X has four notes of Rupee 1,2,5 and 10 denomination.The number of different sums of money he can form from them is ---

a 16

b 15

c 12

d 8

(IAS-PRE-2010)

Answer 1

There can be 15 different sums of money we can formed using 1, 2,5 and 10 denomination notes viz.,

1 = Rs 1,

2 = Rs 2,

5 = Rs 5,

10 = Rs 10,

1 + 2 = Rs 3,

1 + 5 = Rs 6,

1 + 10 = Rs 11,

2 + 5 = Rs 7,

2 + 10 = Rs 12,

5 + 10 = Rs 15,

1 + 2 + 5 = Rs 8,

1 + 2 + 10 = Rs 13,

1 + 5 + 10 = Rs 16,

2 + 5 + 10 = Rs 17,

1 + 2 + 5 + 10 = Rs 18.