Question

. Jumbo bought 5 books, each with a whole-number price.

Answer 1

Answer:

Total price = Mean price × No. of books

Total price = Mean price × No. of books= $10 × 5 = $50.

Now, we will find the cost of other 3books except expensive price and cheapest price.

$50 - ( $15 + $6)

$50 - $21 = $29.

Cost of the 2 books except middle one,

$29 - $8

= $21.

Now, we need a price which is lower than middle one but higher than cheapest price i.e, 7 so

$21 - $7

= $14.

So, the price of remaining two books are $7 and $14 respectively.

Answer 2

Mean is average. Multiply total books by the mean to find the total cost:

5x 10 = $50 total.

Subtract the highest and lowest prices to find the total of the remaining 3 books.

50 - 15-6 = 29

The median price was 8, this is the middle number, subtract 8 from 29 to get the cost of the last 2 books:

29-8 =21

Now you need a price lower than the median but higher than the lowest cost so that has to be 7

Subtract 7 from 21 to get the cost of the last book 21-7 = 14

The price of the remaining books is $7 and $14