contestada

Here are 5 number cards 2 5 7 8 9 one of the cards is removes and the mean average of the remaining four number cards is 6. Which card was removed? You must show your working

Respuesta :

frika

Answer:

7

Step-by-step explanation:

If one of the cards is removes and the mean average of the remaining four number cards is 6, then their sum is [tex]6\cdot 4=24.[/tex]

The sum of all five cards is

[tex]2+5+7+8+9=31.[/tex]

Since [tex]31-24=7,[/tex] then the card with number 7 is removed.

Otras preguntas