Alex pays $\$ 2.25$ to take the bus. Sam pays $\$ 3.00$ to take the bus. If they each take the bus 20 times, how much less would Alex pay than Sam in total?
(A) $\$ 25$
(B) $\$ 10$
(C) $\$ 15$
(D) $\$ 45$
(E) $\$ 60$
Solution 1

Since Alex pays $\$ 2.25$ to take the bus, then 20 trips on the bus would cost Alex $20 \times \$ 2.25=\$ 45$. Since Sam pays $\$ 3.00$ to take the bus, then 20 trips on the bus would cost Sam $20 \times \$ 3.00=\$ 60$. If they each take the bus 20 times, then in total Alex would pay $\$ 60-\$ 45=\$ 15$ less than Sam.

## Solution 2

Since Alex pays $\$ 2.25$ to take the bus, and Sam pays $\$ 3.00$ to take the bus, then Alex pays $\$ 3.00-\$ 2.25=\$ 0.75$ less than Sam each time they take the bus.

If they each take the bus 20 times, then in total Alex would pay $20 \times \$ 0.75=\$ 15$ less than Sam.

ANswer: (C)

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