Final answer:
To find the cost of the $1200 washing machine after a 1/5 discount, calculate the discount ($1200 * 1/5 = $240) and subtract it from the original price ($1200 - $240 = $960), resulting in a final cost of $960.
Step-by-step explanation:
The cost of a $1200 washing machine after a discount of 1/5 of the original price can be calculated using simple arithmetic. First, determine the amount of the discount by multiplying the original price by the discount percentage. Then, subtract the discount amount from the original price to get the final cost.
To calculate the discount: $1200 * 1/5 = $240.
To find the final cost after the discount: $1200 - $240 = $960.
Therefore, the cost of the washing machine after the discount is $960.