Question

Tickets for a school talent show cost $2 for students and $3 for adults. If a family consist of 7 persons spends $17 in total. How many students in that family?

Answer 1

Number of students in the family 4.

 

Explanation:

Type	number	Value($)	Total value
Student		2
Adult		3
			17

now identify the number of students in family:

Type	number	Value($)	Total value
Student	S	2	2S
Adult	3S-7	3	3(3S-7)
Equation			17

 

So that equation will be:

here total family members are 7 so that this equation is that:

2s + 3(3s-7) = 17

2s + 9s - 27 = 17

                  S = 4

 

For above calculation we find number of students in family 4

For above calculation we find number of students in family 4