Question

average of two numbers A and B is 20, average of B and C is 19, C and A is 21. what is the value of A​

Answer 1

Answer:

A = 22

Step-by-step explanation:

(A+B)/2 = 20

A+B = 40

B+C = 38

A+C = 42

A = 40 - b

b = 38-c

c = 42 - a

substituting we get,

b = 38-42+a

a= 40 -38 + 42 -a

2a = 44

a = 22