Answer:
For plan B he will pay less fee.
Step-by-step explanation:
Plan A : $68.40 for 6 piano lessons
Fee for per lesson :
[tex]F_A=\dfrac{68.4}{6}\\\\=\$11.4[/tex]
Plan B : $41.80 for 4 piano lessons
Fee for per lesson :
[tex]F_B=\dfrac{41.8}{4}\\\\=\$10.45[/tex]
Hence, the fee per lesson is less for plan B.