Question

Average of 3 numbers is 40 if 2 numbers are 50 and 40 what is the third number

Answer 1

Answer:

30

Step-by-step explanation:

average of three numbers=40

sum of three numbers=40×3=120

sum of first two numbers=50+40=90

third number= 120-90=30

Answer 2

Answer:

30

Step-by-step explanation:

50+40+x/3 =40

90+x=120

x = 120-90

x = 30