求教两道ps

norlanzhang

A corporation with 5,000,000 shares of publicly listed stock reported total earnings of $7.20 per share for the first 9 months of operation. During the final quarter the number of publicly listed shares was increased to 10,000,000 shares, and fourth quater earnings were reported as $1.25 per share. What are the average annual earnings per share based on the number of shares at the end of the year?
(A) $1.83
(B) $2.43
(C) $4.85
(D) $8.45
(E) $9.70
A discount of 20 percent on an order of goods followed by a discount of 10 percent amounts to
(A) less than one 15 percent discount
(B) the same as one 15 percent discount
(C) the same as one 30 percent discount
(D) less than a discount of 10 percent followed by a discount of 20 percent
(E) the same as a discount of 10 percent followed by a discount of 20 percent
并求过程

stefpurple

1) C
7.2/2+1.25=4.85

2) E
1-(1-20%)*(1-10%)=1-(1-10%)(1-20%)

chouchoumm

A corporation with 5,000,000 shares of publicly listed stock reported total earnings of $7.20 per share for the first 9 months of operation. During the final quarter the number of publicly listed shares was increased to 10,000,000 shares, and fourth quater earnings were reported as $1.25 per share. What are the average annual earnings per share based on the number of shares at the end of the year?
(A) $1.83
(B) $2.43
(C) $4.85
(D) $8.45
(E) $9.70

e/s by the end of year=total earnins/total shares of publicly listed stock =(5,000,000*7.2+10,000,000*1.25)/10,000,000=4.85


A discount of 20 percent on an order of goods followed by a discount of 10 percent amounts to
(A) less than one 15 percent discount
(B) the same as one 15 percent discount
(C) the same as one 30 percent discount
(D) less than a discount of 10 percent followed by a discount of 20 percent
(E) the same as a discount of 10 percent followed by a discount of 20 percent

A discount of 20 percent on an order of goods followed by a discount of 10 percent=original price*(1-20%)(1-10%)=original price*(1-10%)(1-20%)=E