Answer:
3. 5,110,000 and 5,170,000
Explanation:
Number of shares to be used in computing basic earnings per share
= 4800000*12/12 + 200000*9/12 + 4800004/12
= 4800000 + 150000 + 160000
= 5,110,000
Number of shares to be used in computing dilute earnings per share
= 4800000*12/12 + 200000*9/12 + 4800004/12 + (6000000/1000)*40*3/12
= 4800000 + 150000 + 160000 + 60000
= 5,170,000
Therefore, The number of shares to be used in computing basic earnings per share and diluted earnings per share on December 31, 2018 is 5,110,000 and 5,170,000.