Question

PLEASE HELP ME
PLSSSS XX

Answer 1

4, 5, 12

Explanation:

Range = low card - high card

but we find the high card, 8 = 4 - high card

high card = 8 + 4 = 12

mean = (low card + middle card + high card)/3

7 = (4 + middle card + 12) / 3

7 = ( 16 + middle card) / 3

7 × 3 = 16 + middle card

21 = 16 + middle card

hence, the middle card= 21 - 16 = 5

the values of the cards are 4, 5, 12

Answer 2

Card 1: 4

Card 2: 5

Card 3: 12

Explanation:

We know that the smallest card is 4

Range is the difference between the smallest and biggest numbers, which means that the difference between 4 and the largest card is 12

4 + 8 = 12

That means the largest card is 12

Now we just need to find the middle/second card

If the mean is 7 and there are 3 cards, that means the value of the 3 cards needs to equal 21

So far the total value is 12 + 4 = 16

That means the middle/second card's value is 5

Check:

Range: 12 - 4 = 8

Mean: 4 + 12 + 5 = 21 / 3 = 7