Question

A penny collection contains twelve 1967 pennies, seven 1968 pennies, and eleven 1971 pennies. If you are to pick some pennies without looking at the dates, how many must you pick to be sure of getting at least six pennies from the same year

Answer 1

12 because of a 40 percent of 20 as 12 we know that there is a possiblity of almost all of the 12 to be 1967.

Explanation: