The club sold 120 student tickets and 30 adult tickets.
<u>Step-by-step explanation:</u>
The cost of student ticket= $12
The cost of adult ticket= $20
The total cost of 150 tickets sold= $2040
Check for which option gives you the answer as $2040
<u>Option A)</u>
The cost of 30 students= 30*12= $360
The cost of 120 adults= 120*20= $2400
The total cost of 150 tickets= 360+2400= $2760 (exceeds 2040)
<u>Option B)</u>
The cost of 120 students= 120*12= $1440
The cost of 30 adults= 30*20= $600
The total cost of 150 tickets= 1440+600= $2040 <u>(correct answer)</u>
<u>Option C)</u>
The cost of 100 students= 100*12= $1200
The cost of 50 adults= 50*20= $1000
The total cost of 150 tickets= 1200+1000= $2200 (exceeds 2040)
<u>Option D)</u>
The cost of 50 students= 50*12= $600
The cost of 100 adults= 100*20= $2000
The total cost of 150 tickets= 600+2000= $2600 (exceeds 2040)
simplified it would be - 
</h2><h2>Hope this helps!!</h2>