Answer:
Number of T shirt sold = 25
Number of long-sleeve shirt sold = 10
Option A is the correct answer.
Step-by-step explanation:
Let the number of T shirt be t and long-sleeve shirt be s.
We have cost of T shirt = 8$ and cost of long-sleeve shirt = 11 $.
Total number of shirts sold = 35
t + s = 35 -----------------------Equation 1
Dollar collected = 310 by selling 35 shirts = 310 $
8 t + 11 s = 310 -----------------------Equation 2
Equation 1 x 8
8 t + 8 s = 8 x 35 = 280 -----------------------Equation 3
Equation 2 - Equation 3
8 t + 11 s - 8 t - 8 s = 310 - 280 = 30
3 s = 30
s = 10
Substituting in equation 1
t + 10 = 35
t = 25
Equations are 8t + 11s = 310 and t + s = 35
Number of T shirt sold = 25
Number of long-sleeve shirt sold = 10
Option A is the correct answer.
