A dress on sale in a shop is marked at $D. During the discount sale its price is reduced by 25%. Staff are allowed a further 20% reduction on the discounted price. If a staff member buys the dress what will she have to pay in terms of D ?	Choose the correct choice:
A) 0.6D	B) 0.7D	C) 0.5D	D) 0.8D	E) 0.9D
Effective discount = a + b + ab/100 = - 25 - 20 + (-25)(-20)/100 =-40   Sale price = D * ( 1 - 40/100)   Sale price = .6 * D   0.6Dnswer (0.6D)
<result>A</result>
A dress on sale in a shop is marked at $D. During the discount sale its price is reduced by 25%. Staff are allowed a further 20% reduction on the discounted price. If a staff member buys the dress what will she have to pay in terms of D ?