What is the mean of the following set of data? {1,4,7,5,3,3,5}
a. 4.0
b. 4.5
c. 3.5
d. 4.2

A. 4.0

Step-by-step explanation:

Finding the mean is also commonly referred to as the "average".

Add up all of the numbers in the data set, then divide by how many numbers you began with.

Add up the numbers in {1,4,7,5,3,3,5} to get the sum.

1 + 4 + 7 + 5 + 3 + 3 + 5 = 28

Count how many numbers you began with. There were 7 numbers.

Divide sum by the amount of numbers.

28 ÷ 7 = 4

Therefore, the mean of the data set is 4.

The answer is A. 4.0

Step-by-step explanation:

You add up the numbers to get 28 and divide it by 7 (the total number of numbers provided in the set).

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!