How to calculate the probablility that 2 or more people in a group have the same birthday?

Suppose a stock had an initial price of $65 per share, paid a dividend of $1.45 per share during the year, and had an ending share price of $58. a, compute the percentage total return. (a negative answer should be indicated by a minus sign. do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. what was the dividend yield and the capital gains yield? (a negative answer should be indicated by a minus sign. do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)

4. the condition requires that only one of the selected criteria be true for a record to be displayed.

You meet that special person and get married. amazingly your spouse has exactly the same income you do 47,810. if your tax status is now married filing jointly what is your tax liability