Question

the mean of these number cards is 6 what is the total of all three cards what number should replace the question mark

Answer 1

Answer: The total of all three cards is 18.

Step-by-step explanation:

To find the total of all three number cards, we need to consider that the mean (average) of the cards is 6.

If the mean is 6, it means that the sum of all the numbers on the cards divided by the total number of cards is equal to 6.

Let's assume the numbers on the three cards are A, B, and C.

To find the total, we need to add up the numbers on all three cards. So, the equation would be:

(A + B + C) / 3 = 6

Now, we can solve for the total by multiplying both sides of the equation by 3:

A + B + C = 18

Therefore, the total of all three cards is 18.

To determine the number that should replace the question mark, we need more information about the values of A, B, and C. If you can provide the specific values of any two cards, I can help you find the value of the third card.

Hope this helps.

Answer 2

To find the total of all three cards, we can set up an equation using the mean value of 6. By solving for the missing card, we find that the number that should replace the question mark is 7.

Step-by-step explanation:

To find the total of all three cards, we need to know the value of each card. Since the mean of the three cards is 6, we can set up an equation to solve for the missing card. Let's assume the numbers on the cards are x, y, and z. We know that (x + y + z)/3 = 6. Multiplying both sides of the equation by 3 gives us x + y + z = 18. Since we know the values of x and y (from the given information), we can substitute them into the equation and solve for z. This will give us the number that should replace the question mark.

If we substitute the values, we have (5 + 6 + z)/3 = 6. Multiplying both sides by 3 gives us 11 + z = 18. Subtracting 11 from both sides gives us z = 7. So the missing number that should replace the question mark is 7.