Question

Four friends A,B,C&D together have₹47 with them. A&B together have₹27;C&A have₹25; D&A have₹23.How much money B have?

Answer 1

A + B + C + D = 47

A + B = 27

C + A = 25

D + A = 23

From the above information :

C + D = 47 - 27 = 20....... 1

B + D = 47 - 25 = 22........ 2

B + C = 47 - 23 = 24......... 3

From 3.

C = 24 - B

Substituting this in 1 we have :

(24 - B) + D  = 20

D = 20 + B - 24

D = - 4 + B

Substituting this in 2

B + (-4 + B) = 22

B - 4 + B = 22

2B = 22 + 4

2B = 26

B = 26/2

B = 13