Aplay is performed for a crowd of 400 people. adult ticket cost $22 each, student tickets cost $15 each, and tickets for children cost $13.50 each. the revenue for the concert is $7840.there are 40 more children at the concert than students. how many of each type of ticket are sold?

For this case we have the following variables:

A: Represents the number of adults

S: Represents the number of students

C: Represents the number of children

For the income we have:

-----> (1)

Regarding the number of people at the concert we have:

-----> (2)

If there are 40 more children than students, we have:

-----> (3)

We substitute C in the second equation and it remains:

--------> (4)

Substituting (3) and (4) in (1) we have:

So, there are 40 children.

Substituting S in (3) and obtaining C:

Substituting S in (4):

Thus, 280 tickets of adults, 80 of children and 40 of students were sold.

280 tickets for adults, 80 for children and 40 for students

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.